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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Language: | English |
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American Geophysical Union
2018
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ftnerc:oai:nora.nerc.ac.uk:519973 2023-05-15T13:49:35+02:00 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. 2018-05-16 text http://nora.nerc.ac.uk/id/eprint/519973/ https://nora.nerc.ac.uk/id/eprint/519973/1/Paxman_et_al-2018-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL077268 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/519973/1/Paxman_et_al-2018-Geophysical_Research_Letters.pdf Paxman, Guy J.G.; Jamieson, Stewart S.R.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Bentley, Michael J.; Ross, Neil; Armadillo, Egidio; Gasson, Edward G.W.; Leitchenkov, German; DeConto, Robert M. 2018 Bedrock erosion surfaces record former East Antarctic Ice Sheet extent. Geophysical Research Letters, 45 (9). 4114-4123. https://doi.org/10.1029/2018GL077268 <https://doi.org/10.1029/2018GL077268> cc_by_4 CC-BY Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1029/2018GL077268 2023-02-04T19:46:32Z 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 is 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 meter 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 Natural Environment Research Council: NERC Open Research Archive 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 |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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 is 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 meter 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. |
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. |
spellingShingle |
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 |
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 |
American Geophysical Union |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/519973/ https://nora.nerc.ac.uk/id/eprint/519973/1/Paxman_et_al-2018-Geophysical_Research_Letters.pdf 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 |
https://nora.nerc.ac.uk/id/eprint/519973/1/Paxman_et_al-2018-Geophysical_Research_Letters.pdf Paxman, Guy J.G.; Jamieson, Stewart S.R.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Bentley, Michael J.; Ross, Neil; Armadillo, Egidio; Gasson, Edward G.W.; Leitchenkov, German; DeConto, Robert M. 2018 Bedrock erosion surfaces record former East Antarctic Ice Sheet extent. Geophysical Research Letters, 45 (9). 4114-4123. https://doi.org/10.1029/2018GL077268 <https://doi.org/10.1029/2018GL077268> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
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 |
_version_ |
1766251765236236288 |