Holocene melting of the West Antarctic Ice Sheet driven by tropical Pacific warming

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dc.contributor.authorSproson, Adam D.
dc.contributor.authorYokoyama, Yusuke
dc.contributor.authorMiyairi, Yosuke
dc.contributor.authorAze, Takahiro
dc.contributor.authorTotten, Rebecca L.
dc.contributor.otherUniversity of Tokyo
dc.contributor.otherJapan Agency for Marine-Earth Science & Technology (JAMSTEC)
dc.contributor.otherAustralian National University
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2023-09-28T19:34:33Z
dc.date.available2023-09-28T19:34:33Z
dc.date.issued2022
dc.description.abstractIce loss from the Amundsen Sea sector of West Antarctica is rapidly accelerating. Here, the authors reveal that this region also underwent thinning and retreat from 9 to 6 thousand years ago, due to atmospheric connections with a warming tropical Pacific. The primary Antarctic contribution to modern sea-level rise is glacial discharge from the Amundsen Sea sector of the West Antarctic Ice Sheet. The main processes responsible for ice mass loss include: (1) ocean-driven melting of ice shelves by upwelling of warm water onto the continental shelf; and (2) atmospheric-driven surface melting of glaciers along the Antarctic coast. Understanding the relative influence of these processes on glacial stability is imperative to predicting sea-level rise. Employing a beryllium isotope-based reconstruction of ice-shelf history, we demonstrate that glaciers flowing into the Amundsen Sea Embayment underwent melting and retreat between 9 and 6 thousand years ago. Despite warm ocean water influence, this melting event was mainly forced by atmospheric circulation changes over continental West Antarctica, linked via a Rossby wave train to tropical Pacific Ocean warming. This millennial-scale glacial history may be used to validate contemporary ice-sheet models and improve sea-level projections.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.citationSproson, A. D., Yokoyama, Y., Miyairi, Y., Aze, T., & Totten, R. L. (2022). Holocene melting of the West Antarctic Ice Sheet driven by tropical Pacific warming. In Nature Communications (Vol. 13, Issue 1). Springer Science and Business Media LLC. https://doi.org/10.1038/s41467-022-30076-2
dc.identifier.doi10.1038/s41467-022-30076-2
dc.identifier.orcidhttps://orcid.org/0000-0001-7869-5891
dc.identifier.orcidhttps://orcid.org/0000-0002-8227-2848
dc.identifier.orcidhttps://orcid.org/0000-0002-1107-3673
dc.identifier.urihttps://ir.ua.edu/handle/123456789/11471
dc.languageEnglish
dc.language.isoen_US
dc.publisherNature Portfolio
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAMUNDSEN SEA EMBAYMENT
dc.subjectGROUNDING LINE RETREAT
dc.subjectPINE ISLAND
dc.subjectBERYLLIUM ISOTOPES
dc.subjectBE-10/BE-9 RATIOS
dc.subjectGLACIAL DISCHARGE
dc.subjectMETEORIC BE-10
dc.subjectIN-SITU
dc.subjectCLIMATE
dc.subjectSHELF
dc.subjectMultidisciplinary Sciences
dc.titleHolocene melting of the West Antarctic Ice Sheet driven by tropical Pacific warmingen_US
dc.typeArticle
dc.typetext
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