Evidence of an active volcanic heat source beneath the Pine Island Glacier
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 9 (2018): 2431, doi:10.1038/s41467-018-04421-3. Tectonic landforms reveal that the West Antarctic Ice Sheet (WAIS) lies atop a...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10453 2023-05-15T13:48:31+02:00 Evidence of an active volcanic heat source beneath the Pine Island Glacier Loose, Brice Naveira Garabato, Alberto C. Schlosser, Peter Jenkins, William J. Vaughan, David Heywood, Karen J. 2018-06-22 https://hdl.handle.net/1912/10453 en_US eng Nature Publishing Group https://doi.org/10.1038/s41467-018-04421-3 Nature Communications 9 (2018): 2431 https://hdl.handle.net/1912/10453 doi:10.1038/s41467-018-04421-3 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Nature Communications 9 (2018): 2431 doi:10.1038/s41467-018-04421-3 Article 2018 ftwhoas https://doi.org/10.1038/s41467-018-04421-3 2022-05-28T23:00:25Z © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 9 (2018): 2431, doi:10.1038/s41467-018-04421-3. Tectonic landforms reveal that the West Antarctic Ice Sheet (WAIS) lies atop a major volcanic rift system. However, identifying subglacial volcanism is challenging. Here we show geochemical evidence of a volcanic heat source upstream of the fast-melting Pine Island Ice Shelf, documented by seawater helium isotope ratios at the front of the Ice Shelf cavity. The localization of mantle helium to glacial meltwater reveals that volcanic heat induces melt beneath the grounded glacier and feeds the subglacial hydrological network crossing the grounding line. The observed transport of mantle helium out of the Ice Shelf cavity indicates that volcanic heat is supplied to the grounded glacier at a rate of ~ 2500 ± 1700 MW, which is ca. half as large as the active Grimsvötn volcano on Iceland. Our finding of a substantial volcanic heat source beneath a major WAIS glacier highlights the need to understand subglacial volcanism, its hydrologic interaction with the marine margins, and its potential role in the future stability of the WAIS. This research was supported by the NSF Antarctic program through Award #1341630. Article in Journal/Newspaper Antarc* Antarctic glacier Ice Sheet Ice Shelf Iceland Pine Island Glacier Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctic Ice Sheet Nature Communications 9 1 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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English |
description |
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 9 (2018): 2431, doi:10.1038/s41467-018-04421-3. Tectonic landforms reveal that the West Antarctic Ice Sheet (WAIS) lies atop a major volcanic rift system. However, identifying subglacial volcanism is challenging. Here we show geochemical evidence of a volcanic heat source upstream of the fast-melting Pine Island Ice Shelf, documented by seawater helium isotope ratios at the front of the Ice Shelf cavity. The localization of mantle helium to glacial meltwater reveals that volcanic heat induces melt beneath the grounded glacier and feeds the subglacial hydrological network crossing the grounding line. The observed transport of mantle helium out of the Ice Shelf cavity indicates that volcanic heat is supplied to the grounded glacier at a rate of ~ 2500 ± 1700 MW, which is ca. half as large as the active Grimsvötn volcano on Iceland. Our finding of a substantial volcanic heat source beneath a major WAIS glacier highlights the need to understand subglacial volcanism, its hydrologic interaction with the marine margins, and its potential role in the future stability of the WAIS. This research was supported by the NSF Antarctic program through Award #1341630. |
format |
Article in Journal/Newspaper |
author |
Loose, Brice Naveira Garabato, Alberto C. Schlosser, Peter Jenkins, William J. Vaughan, David Heywood, Karen J. |
spellingShingle |
Loose, Brice Naveira Garabato, Alberto C. Schlosser, Peter Jenkins, William J. Vaughan, David Heywood, Karen J. Evidence of an active volcanic heat source beneath the Pine Island Glacier |
author_facet |
Loose, Brice Naveira Garabato, Alberto C. Schlosser, Peter Jenkins, William J. Vaughan, David Heywood, Karen J. |
author_sort |
Loose, Brice |
title |
Evidence of an active volcanic heat source beneath the Pine Island Glacier |
title_short |
Evidence of an active volcanic heat source beneath the Pine Island Glacier |
title_full |
Evidence of an active volcanic heat source beneath the Pine Island Glacier |
title_fullStr |
Evidence of an active volcanic heat source beneath the Pine Island Glacier |
title_full_unstemmed |
Evidence of an active volcanic heat source beneath the Pine Island Glacier |
title_sort |
evidence of an active volcanic heat source beneath the pine island glacier |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/10453 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Pine Island Glacier West Antarctic Ice Sheet |
geographic_facet |
Antarctic Pine Island Glacier West Antarctic Ice Sheet |
genre |
Antarc* Antarctic glacier Ice Sheet Ice Shelf Iceland Pine Island Glacier |
genre_facet |
Antarc* Antarctic glacier Ice Sheet Ice Shelf Iceland Pine Island Glacier |
op_source |
Nature Communications 9 (2018): 2431 doi:10.1038/s41467-018-04421-3 |
op_relation |
https://doi.org/10.1038/s41467-018-04421-3 Nature Communications 9 (2018): 2431 https://hdl.handle.net/1912/10453 doi:10.1038/s41467-018-04421-3 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-018-04421-3 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766249350298599424 |