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Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse

Geodetic, seismic, and geological evidence indicates that West Antarctica is underlain by low-viscosity shallow mantle. Thus, as marine-based sectors of the West Antarctic Ice Sheet (WAIS) retreated during past interglacials, or will retreat in the future, exposed bedrock will rebound rapidly and fl...

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Autores principales: Pan, Linda, Powell, Evelyn M., Latychev, Konstantin, Mitrovica, Jerry X., Creveling, Jessica R., Gomez, Natalya, Hoggard, Mark J., Clark, Peter U.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8087405/
https://www.ncbi.nlm.nih.gov/pubmed/33931453
http://dx.doi.org/10.1126/sciadv.abf7787
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author Pan, Linda
Powell, Evelyn M.
Latychev, Konstantin
Mitrovica, Jerry X.
Creveling, Jessica R.
Gomez, Natalya
Hoggard, Mark J.
Clark, Peter U.
author_facet Pan, Linda
Powell, Evelyn M.
Latychev, Konstantin
Mitrovica, Jerry X.
Creveling, Jessica R.
Gomez, Natalya
Hoggard, Mark J.
Clark, Peter U.
author_sort Pan, Linda
collection PubMed
description Geodetic, seismic, and geological evidence indicates that West Antarctica is underlain by low-viscosity shallow mantle. Thus, as marine-based sectors of the West Antarctic Ice Sheet (WAIS) retreated during past interglacials, or will retreat in the future, exposed bedrock will rebound rapidly and flux meltwater out into the open ocean. Previous studies have suggested that this contribution to global mean sea level (GMSL) rise is small and occurs slowly. We challenge this notion using sea level predictions that incorporate both the outflux mechanism and complex three-dimensional viscoelastic mantle structure. In the case of the last interglacial, where the GMSL contribution from WAIS collapse is often cited as ~3 to 4 meters, the outflux mechanism contributes ~1 meter of additional GMSL change within ~1 thousand years of the collapse. Using a projection of future WAIS collapse, we also demonstrate that the outflux can substantially amplify GMSL rise estimates over the next century.
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spelling pubmed-80874052021-05-13 Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse Pan, Linda Powell, Evelyn M. Latychev, Konstantin Mitrovica, Jerry X. Creveling, Jessica R. Gomez, Natalya Hoggard, Mark J. Clark, Peter U. Sci Adv Research Articles Geodetic, seismic, and geological evidence indicates that West Antarctica is underlain by low-viscosity shallow mantle. Thus, as marine-based sectors of the West Antarctic Ice Sheet (WAIS) retreated during past interglacials, or will retreat in the future, exposed bedrock will rebound rapidly and flux meltwater out into the open ocean. Previous studies have suggested that this contribution to global mean sea level (GMSL) rise is small and occurs slowly. We challenge this notion using sea level predictions that incorporate both the outflux mechanism and complex three-dimensional viscoelastic mantle structure. In the case of the last interglacial, where the GMSL contribution from WAIS collapse is often cited as ~3 to 4 meters, the outflux mechanism contributes ~1 meter of additional GMSL change within ~1 thousand years of the collapse. Using a projection of future WAIS collapse, we also demonstrate that the outflux can substantially amplify GMSL rise estimates over the next century. American Association for the Advancement of Science 2021-04-30 /pmc/articles/PMC8087405/ /pubmed/33931453 http://dx.doi.org/10.1126/sciadv.abf7787 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Pan, Linda
Powell, Evelyn M.
Latychev, Konstantin
Mitrovica, Jerry X.
Creveling, Jessica R.
Gomez, Natalya
Hoggard, Mark J.
Clark, Peter U.
Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse
title Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse
title_full Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse
title_fullStr Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse
title_full_unstemmed Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse
title_short Rapid postglacial rebound amplifies global sea level rise following West Antarctic Ice Sheet collapse
title_sort rapid postglacial rebound amplifies global sea level rise following west antarctic ice sheet collapse
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8087405/
https://www.ncbi.nlm.nih.gov/pubmed/33931453
http://dx.doi.org/10.1126/sciadv.abf7787
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