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 |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union
2018
|
Subjects: | |
Online Access: | http://dro.dur.ac.uk/24710/ http://dro.dur.ac.uk/24710/1/24710.pdf http://dro.dur.ac.uk/24710/2/24710.pdf http://dro.dur.ac.uk/24710/3/24710.pdf https://doi.org/10.1029/2018GL077268 |
id |
ftunivdurham:oai:dro.dur.ac.uk.OAI2:24710 |
---|---|
record_format |
openpolar |
spelling |
ftunivdurham:oai:dro.dur.ac.uk.OAI2:24710 2023-05-15T13:37:59+02:00 Bedrock erosion surfaces record former East Antarctic Ice Sheet extent. Paxman, G. J. G. Jamieson, S. S. R. Ferraccioli, F. Bentley, M. J. Ross, N. Armadillo, E. Gasson, E. G. W. Leitchenkov, G. DeConto, R. M. 2018-05-16 application/pdf http://dro.dur.ac.uk/24710/ http://dro.dur.ac.uk/24710/1/24710.pdf http://dro.dur.ac.uk/24710/2/24710.pdf http://dro.dur.ac.uk/24710/3/24710.pdf https://doi.org/10.1029/2018GL077268 unknown American Geophysical Union dro:24710 issn:0094-8276 issn: 1944-8007 doi:10.1029/2018GL077268 http://dro.dur.ac.uk/24710/ https://doi.org/10.1029/2018GL077268 http://dro.dur.ac.uk/24710/1/24710.pdf http://dro.dur.ac.uk/24710/2/24710.pdf http://dro.dur.ac.uk/24710/3/24710.pdf © 2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Geophysical research letters, 2018, Vol.45(9), pp.4114-4123 [Peer Reviewed Journal] Article PeerReviewed 2018 ftunivdurham https://doi.org/10.1029/2018GL077268 2020-08-27T22:21:54Z 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 Durham University: Durham Research Online Antarctic East Antarctic Ice Sheet East Antarctica Wilkes Subglacial Basin ENVELOPE(145.000,145.000,-75.000,-75.000) Geophysical Research Letters 45 9 4114 4123 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
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, G. J. G. Jamieson, S. S. R. Ferraccioli, F. Bentley, M. J. Ross, N. Armadillo, E. Gasson, E. G. W. Leitchenkov, G. DeConto, R. M. |
spellingShingle |
Paxman, G. J. G. Jamieson, S. S. R. Ferraccioli, F. Bentley, M. J. Ross, N. Armadillo, E. Gasson, E. G. W. Leitchenkov, G. DeConto, R. M. Bedrock erosion surfaces record former East Antarctic Ice Sheet extent. |
author_facet |
Paxman, G. J. G. Jamieson, S. S. R. Ferraccioli, F. Bentley, M. J. Ross, N. Armadillo, E. Gasson, E. G. W. Leitchenkov, G. DeConto, R. M. |
author_sort |
Paxman, G. 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://dro.dur.ac.uk/24710/ http://dro.dur.ac.uk/24710/1/24710.pdf http://dro.dur.ac.uk/24710/2/24710.pdf http://dro.dur.ac.uk/24710/3/24710.pdf https://doi.org/10.1029/2018GL077268 |
long_lat |
ENVELOPE(145.000,145.000,-75.000,-75.000) |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica Wilkes Subglacial Basin |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica Wilkes Subglacial Basin |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
Geophysical research letters, 2018, Vol.45(9), pp.4114-4123 [Peer Reviewed Journal] |
op_relation |
dro:24710 issn:0094-8276 issn: 1944-8007 doi:10.1029/2018GL077268 http://dro.dur.ac.uk/24710/ https://doi.org/10.1029/2018GL077268 http://dro.dur.ac.uk/24710/1/24710.pdf http://dro.dur.ac.uk/24710/2/24710.pdf http://dro.dur.ac.uk/24710/3/24710.pdf |
op_rights |
© 2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
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_ |
1766100259887382528 |