Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback
Abstract Mantle melt generation in response to glacial unloading has been linked to enhanced magmatic volatile release in Iceland and global eruptive records. It is unclear whether this process is important in systems lacking evidence of enhanced eruptions. The deglaciation of the Yellowstone ice ca...
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ftdoajarticles:oai:doaj.org/article:cd637d80f3a145d386174d6b7f68ce39 2024-09-15T17:48:13+00:00 Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback Fiona Clerc Mark D. Behn Brent M. Minchew 2024-02-01T00:00:00Z https://doi.org/10.1038/s41467-024-45890-z https://doaj.org/article/cd637d80f3a145d386174d6b7f68ce39 EN eng Nature Portfolio https://doi.org/10.1038/s41467-024-45890-z https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-45890-z 2041-1723 https://doaj.org/article/cd637d80f3a145d386174d6b7f68ce39 Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024) Science Q article 2024 ftdoajarticles https://doi.org/10.1038/s41467-024-45890-z 2024-08-05T17:49:52Z Abstract Mantle melt generation in response to glacial unloading has been linked to enhanced magmatic volatile release in Iceland and global eruptive records. It is unclear whether this process is important in systems lacking evidence of enhanced eruptions. The deglaciation of the Yellowstone ice cap did not observably enhance volcanism, yet Yellowstone emits large volumes of CO2 due to melt crystallization at depth. Here we model mantle melting and CO2 release during the deglaciation of Yellowstone (using Iceland as a benchmark). We find mantle melting is enhanced 19-fold during deglaciation, generating an additional 250–620 km3. These melts segregate an additional 18–79 Gt of CO2 from the mantle, representing a ~3–15% increase in the global volcanic CO2 flux (if degassed immediately). We suggest deglaciation-enhanced mantle melting is important in continental settings with partially molten mantle – including Greenland and West Antarctica – potentially implying positive feedbacks between deglaciation and climate warming. Article in Journal/Newspaper Antarc* Antarctica Greenland Ice cap Iceland West Antarctica Directory of Open Access Journals: DOAJ Articles Nature Communications 15 1 |
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Science Q Fiona Clerc Mark D. Behn Brent M. Minchew Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback |
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Science Q |
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Abstract Mantle melt generation in response to glacial unloading has been linked to enhanced magmatic volatile release in Iceland and global eruptive records. It is unclear whether this process is important in systems lacking evidence of enhanced eruptions. The deglaciation of the Yellowstone ice cap did not observably enhance volcanism, yet Yellowstone emits large volumes of CO2 due to melt crystallization at depth. Here we model mantle melting and CO2 release during the deglaciation of Yellowstone (using Iceland as a benchmark). We find mantle melting is enhanced 19-fold during deglaciation, generating an additional 250–620 km3. These melts segregate an additional 18–79 Gt of CO2 from the mantle, representing a ~3–15% increase in the global volcanic CO2 flux (if degassed immediately). We suggest deglaciation-enhanced mantle melting is important in continental settings with partially molten mantle – including Greenland and West Antarctica – potentially implying positive feedbacks between deglaciation and climate warming. |
format |
Article in Journal/Newspaper |
author |
Fiona Clerc Mark D. Behn Brent M. Minchew |
author_facet |
Fiona Clerc Mark D. Behn Brent M. Minchew |
author_sort |
Fiona Clerc |
title |
Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback |
title_short |
Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback |
title_full |
Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback |
title_fullStr |
Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback |
title_full_unstemmed |
Deglaciation-enhanced mantle CO2 fluxes at Yellowstone imply positive climate feedback |
title_sort |
deglaciation-enhanced mantle co2 fluxes at yellowstone imply positive climate feedback |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41467-024-45890-z https://doaj.org/article/cd637d80f3a145d386174d6b7f68ce39 |
genre |
Antarc* Antarctica Greenland Ice cap Iceland West Antarctica |
genre_facet |
Antarc* Antarctica Greenland Ice cap Iceland West Antarctica |
op_source |
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024) |
op_relation |
https://doi.org/10.1038/s41467-024-45890-z https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-45890-z 2041-1723 https://doaj.org/article/cd637d80f3a145d386174d6b7f68ce39 |
op_doi |
https://doi.org/10.1038/s41467-024-45890-z |
container_title |
Nature Communications |
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15 |
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1 |
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1810289379726327808 |