The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux
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 acti...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:147043 2023-05-15T16:40:05+02:00 The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux Armitage, JJ Ferguson, DJ Petersen, KD Creyts, TT 2019-06-28 text https://eprints.whiterose.ac.uk/147043/ https://eprints.whiterose.ac.uk/147043/8/Armitage_et_al-2019-Geophysical_Research_Letters.pdf en eng American Geophysical Union https://eprints.whiterose.ac.uk/147043/8/Armitage_et_al-2019-Geophysical_Research_Letters.pdf 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 Article NonPeerReviewed 2019 ftleedsuniv 2023-01-30T22:19:35Z 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. Article in Journal/Newspaper Ice Sheet Iceland White Rose Research Online (Universities of Leeds, Sheffield & York) |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Armitage, JJ Ferguson, DJ Petersen, KD Creyts, TT |
spellingShingle |
Armitage, JJ Ferguson, DJ Petersen, KD Creyts, TT The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux |
author_facet |
Armitage, JJ Ferguson, DJ Petersen, KD Creyts, TT |
author_sort |
Armitage, JJ |
title |
The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux |
title_short |
The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux |
title_full |
The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux |
title_fullStr |
The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux |
title_full_unstemmed |
The importance of Icelandic ice sheet growth and retreat on mantle CO2 flux |
title_sort |
importance of icelandic ice sheet growth and retreat on mantle co2 flux |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://eprints.whiterose.ac.uk/147043/ https://eprints.whiterose.ac.uk/147043/8/Armitage_et_al-2019-Geophysical_Research_Letters.pdf |
genre |
Ice Sheet Iceland |
genre_facet |
Ice Sheet Iceland |
op_relation |
https://eprints.whiterose.ac.uk/147043/8/Armitage_et_al-2019-Geophysical_Research_Letters.pdf 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 |
_version_ |
1766030451338641408 |