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dc.contributor.authorLoose, Brice  Concept link
dc.contributor.authorNaveira Garabato, Alberto C.  Concept link
dc.contributor.authorSchlosser, Peter  Concept link
dc.contributor.authorJenkins, William J.  Concept link
dc.contributor.authorVaughan, David  Concept link
dc.contributor.authorHeywood, Karen J.  Concept link
dc.identifier.citationNature Communications 9 (2018): 2431en_US
dc.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.en_US
dc.description.abstractTectonic 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.en_US
dc.description.sponsorshipThis research was supported by the NSF Antarctic program through Award #1341630.en_US
dc.publisherNature Publishing Groupen_US
dc.rightsAttribution 4.0 International*
dc.titleEvidence of an active volcanic heat source beneath the Pine Island Glacieren_US

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Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International