Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent
East Antarctica hosts large subglacial basins into which the East Antarctic Ice Sheet (EAIS) likely retreated during past warmer climates. However, the extent of retreat remains poorly constrained, making quantifying past and predicted future contributions to global sea level rise from these marine...
Published in: | Geophysical Research Letters |
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Online Access: | http://hdl.handle.net/11567/911092 https://doi.org/10.1029/2018GL077268 |
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ftunivgenova:oai:iris.unige.it:11567/911092 2024-02-11T09:56:17+01:00 Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent Paxman, Guy J. G. Jamieson, Stewart S. R. Ferraccioli, Fausto Bentley, Michael J. Ross, Neil Armadillo, Egidio Gasson, Edward G. W. Leitchenkov, German Deconto, Robert M. Paxman, Guy J. G. Jamieson, Stewart S. R. Ferraccioli, Fausto Bentley, Michael J. Ross, Neil Armadillo, Egidio Gasson, Edward G. W. Leitchenkov, German Deconto, Robert M. 2018 STAMPA http://hdl.handle.net/11567/911092 https://doi.org/10.1029/2018GL077268 eng eng Blackwell Publishing Ltd country:USA info:eu-repo/semantics/altIdentifier/wos/WOS:000434111700041 volume:45 (9) firstpage:4114 lastpage:4123 numberofpages:10 journal:GEOPHYSICAL RESEARCH LETTERS http://hdl.handle.net/11567/911092 doi:10.1029/2018GL077268 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85046625415 info:eu-repo/semantics/openAccess Geophysics Earth and Planetary Sciences (all) info:eu-repo/semantics/article 2018 ftunivgenova https://doi.org/10.1029/2018GL077268 2024-01-24T17:40:40Z East Antarctica hosts large subglacial basins into which the East Antarctic Ice Sheet (EAIS) likely retreated during past warmer climates. However, the extent of retreat remains poorly constrained, making quantifying past and predicted future contributions to global sea level rise from these marine basins challenging. Geomorphological analysis and flexural modeling within the Wilkes Subglacial Basin are used to reconstruct the ice margin during warm intervals of the Oligocene-Miocene. Flat-lying bedrock plateaus are indicative of an ice sheet margin positioned >400-500 km inland of the modern grounding zone for extended periods of the Oligocene-Miocene, equivalent to a 2-m rise in global sea level. Our findings imply that if major EAIS retreat occurs in the future, isostatic rebound will enable the plateau surfaces to act as seeding points for extensive ice rises, thus limiting extensive ice margin retreat of the scale seen during the early EAIS. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Università degli Studi di Genova: CINECA IRIS Antarctic East Antarctica East Antarctic Ice Sheet Wilkes Subglacial Basin ENVELOPE(145.000,145.000,-75.000,-75.000) Geophysical Research Letters 45 9 4114 4123 |
institution |
Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
topic |
Geophysics Earth and Planetary Sciences (all) |
spellingShingle |
Geophysics Earth and Planetary Sciences (all) Paxman, Guy J. G. Jamieson, Stewart S. R. Ferraccioli, Fausto Bentley, Michael J. Ross, Neil Armadillo, Egidio Gasson, Edward G. W. Leitchenkov, German Deconto, Robert M. Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent |
topic_facet |
Geophysics Earth and Planetary Sciences (all) |
description |
East Antarctica hosts large subglacial basins into which the East Antarctic Ice Sheet (EAIS) likely retreated during past warmer climates. However, the extent of retreat remains poorly constrained, making quantifying past and predicted future contributions to global sea level rise from these marine basins challenging. Geomorphological analysis and flexural modeling within the Wilkes Subglacial Basin are used to reconstruct the ice margin during warm intervals of the Oligocene-Miocene. Flat-lying bedrock plateaus are indicative of an ice sheet margin positioned >400-500 km inland of the modern grounding zone for extended periods of the Oligocene-Miocene, equivalent to a 2-m rise in global sea level. Our findings imply that if major EAIS retreat occurs in the future, isostatic rebound will enable the plateau surfaces to act as seeding points for extensive ice rises, thus limiting extensive ice margin retreat of the scale seen during the early EAIS. |
author2 |
Paxman, Guy J. G. Jamieson, Stewart S. R. Ferraccioli, Fausto Bentley, Michael J. Ross, Neil Armadillo, Egidio Gasson, Edward G. W. Leitchenkov, German Deconto, Robert M. |
format |
Article in Journal/Newspaper |
author |
Paxman, Guy J. G. Jamieson, Stewart S. R. Ferraccioli, Fausto Bentley, Michael J. Ross, Neil Armadillo, Egidio Gasson, Edward G. W. Leitchenkov, German Deconto, Robert M. |
author_facet |
Paxman, Guy J. G. Jamieson, Stewart S. R. Ferraccioli, Fausto Bentley, Michael J. Ross, Neil Armadillo, Egidio Gasson, Edward G. W. Leitchenkov, German Deconto, Robert M. |
author_sort |
Paxman, Guy J. G. |
title |
Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent |
title_short |
Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent |
title_full |
Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent |
title_fullStr |
Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent |
title_full_unstemmed |
Bedrock Erosion Surfaces Record Former East Antarctic Ice Sheet Extent |
title_sort |
bedrock erosion surfaces record former east antarctic ice sheet extent |
publisher |
Blackwell Publishing Ltd |
publishDate |
2018 |
url |
http://hdl.handle.net/11567/911092 https://doi.org/10.1029/2018GL077268 |
long_lat |
ENVELOPE(145.000,145.000,-75.000,-75.000) |
geographic |
Antarctic East Antarctica East Antarctic Ice Sheet Wilkes Subglacial Basin |
geographic_facet |
Antarctic East Antarctica East Antarctic Ice Sheet Wilkes Subglacial Basin |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000434111700041 volume:45 (9) firstpage:4114 lastpage:4123 numberofpages:10 journal:GEOPHYSICAL RESEARCH LETTERS http://hdl.handle.net/11567/911092 doi:10.1029/2018GL077268 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85046625415 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018GL077268 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
9 |
container_start_page |
4114 |
op_container_end_page |
4123 |
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1790602033808539648 |