Relative sea-level rise around East Antarctica during Oligocene glaciation
During the middle and late Eocene (∼48-34 Myr ago), the Earth's climate cooled and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarcticainduced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea level rosedespite an o...
Published in: | Nature Geoscience |
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Online Access: | https://espace.library.uq.edu.au/view/UQ:303118 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:303118 2023-05-15T13:49:28+02:00 Relative sea-level rise around East Antarctica during Oligocene glaciation Stocchi, Paolo Escutia, Carlota Houben, Alexander J. P. Vermeersen, Bert L. A. Bijl, Peter K. Brinkhuis, Henk DeConto, Robert M. Galeotti, Simone Passchier, Sandra Pollard, David Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James A. P. Bohaty, Steven M. Carr, Stephanie A. Dunbar, Robert B. Flores, Jose Abel Gonzàlez, Jhon J. Hayden, Travis G. Iwai, Masao Jimenez-Espejo, Francisco J. Katsuki, Kota Kong, Gee Soo McKay, Robert M. Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F. Pross, Jörg Riesselman, Christina Röhl, Ursula 2013-05-01 https://espace.library.uq.edu.au/view/UQ:303118 eng eng Nature Publishing Group doi:10.1038/ngeo1783 issn:1752-0894 issn:1752-0908 ALW-GO-A0/02-05 Not set CTM2011-24079 ANT-1245283 ES0701 ANT-0424589 1043018 OCE-1202632 NE/I006257/1 NE/H025162/1 Climate transition Ice-sheet Eustasy Records 1900 Earth and Planetary Sciences Journal Article 2013 ftunivqespace https://doi.org/10.1038/ngeo1783 2020-12-15T00:06:45Z During the middle and late Eocene (∼48-34 Myr ago), the Earth's climate cooled and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarcticainduced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea level rosedespite an overall reduction in the mass of the ocean caused by the transfer of water to the ice sheet. Here we identify the crustal response to ice-sheet growth by forcing a glacial-hydro isostatic adjustment model with an Antarctic ice-sheet model. We find that the shelf areas around East Antarctica first shoaled as upper mantle material upwelled and a peripheral forebulge developed. The inner shelf subsequently subsided as lithosphere flexure extended outwards from the ice-sheet margins. Consequently the coasts experienced a progressive relative sea-level rise. Our analysis of sediment cores from the vicinity of the Antarctic ice sheet are in agreement with the spatial patterns of relative sea-level change indicated by our simulations. Our results are consistent with the suggestion that near-field processes such as local sea-level change influence the equilibrium state obtained by an icesheet grounding line. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet The University of Queensland: UQ eSpace Antarctic East Antarctica The Antarctic Nature Geoscience 6 5 380 384 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Climate transition Ice-sheet Eustasy Records 1900 Earth and Planetary Sciences |
spellingShingle |
Climate transition Ice-sheet Eustasy Records 1900 Earth and Planetary Sciences Stocchi, Paolo Escutia, Carlota Houben, Alexander J. P. Vermeersen, Bert L. A. Bijl, Peter K. Brinkhuis, Henk DeConto, Robert M. Galeotti, Simone Passchier, Sandra Pollard, David Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James A. P. Bohaty, Steven M. Carr, Stephanie A. Dunbar, Robert B. Flores, Jose Abel Gonzàlez, Jhon J. Hayden, Travis G. Iwai, Masao Jimenez-Espejo, Francisco J. Katsuki, Kota Kong, Gee Soo McKay, Robert M. Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F. Pross, Jörg Riesselman, Christina Röhl, Ursula Relative sea-level rise around East Antarctica during Oligocene glaciation |
topic_facet |
Climate transition Ice-sheet Eustasy Records 1900 Earth and Planetary Sciences |
description |
During the middle and late Eocene (∼48-34 Myr ago), the Earth's climate cooled and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarcticainduced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea level rosedespite an overall reduction in the mass of the ocean caused by the transfer of water to the ice sheet. Here we identify the crustal response to ice-sheet growth by forcing a glacial-hydro isostatic adjustment model with an Antarctic ice-sheet model. We find that the shelf areas around East Antarctica first shoaled as upper mantle material upwelled and a peripheral forebulge developed. The inner shelf subsequently subsided as lithosphere flexure extended outwards from the ice-sheet margins. Consequently the coasts experienced a progressive relative sea-level rise. Our analysis of sediment cores from the vicinity of the Antarctic ice sheet are in agreement with the spatial patterns of relative sea-level change indicated by our simulations. Our results are consistent with the suggestion that near-field processes such as local sea-level change influence the equilibrium state obtained by an icesheet grounding line. |
format |
Article in Journal/Newspaper |
author |
Stocchi, Paolo Escutia, Carlota Houben, Alexander J. P. Vermeersen, Bert L. A. Bijl, Peter K. Brinkhuis, Henk DeConto, Robert M. Galeotti, Simone Passchier, Sandra Pollard, David Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James A. P. Bohaty, Steven M. Carr, Stephanie A. Dunbar, Robert B. Flores, Jose Abel Gonzàlez, Jhon J. Hayden, Travis G. Iwai, Masao Jimenez-Espejo, Francisco J. Katsuki, Kota Kong, Gee Soo McKay, Robert M. Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F. Pross, Jörg Riesselman, Christina Röhl, Ursula |
author_facet |
Stocchi, Paolo Escutia, Carlota Houben, Alexander J. P. Vermeersen, Bert L. A. Bijl, Peter K. Brinkhuis, Henk DeConto, Robert M. Galeotti, Simone Passchier, Sandra Pollard, David Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James A. P. Bohaty, Steven M. Carr, Stephanie A. Dunbar, Robert B. Flores, Jose Abel Gonzàlez, Jhon J. Hayden, Travis G. Iwai, Masao Jimenez-Espejo, Francisco J. Katsuki, Kota Kong, Gee Soo McKay, Robert M. Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F. Pross, Jörg Riesselman, Christina Röhl, Ursula |
author_sort |
Stocchi, Paolo |
title |
Relative sea-level rise around East Antarctica during Oligocene glaciation |
title_short |
Relative sea-level rise around East Antarctica during Oligocene glaciation |
title_full |
Relative sea-level rise around East Antarctica during Oligocene glaciation |
title_fullStr |
Relative sea-level rise around East Antarctica during Oligocene glaciation |
title_full_unstemmed |
Relative sea-level rise around East Antarctica during Oligocene glaciation |
title_sort |
relative sea-level rise around east antarctica during oligocene glaciation |
publisher |
Nature Publishing Group |
publishDate |
2013 |
url |
https://espace.library.uq.edu.au/view/UQ:303118 |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_relation |
doi:10.1038/ngeo1783 issn:1752-0894 issn:1752-0908 ALW-GO-A0/02-05 Not set CTM2011-24079 ANT-1245283 ES0701 ANT-0424589 1043018 OCE-1202632 NE/I006257/1 NE/H025162/1 |
op_doi |
https://doi.org/10.1038/ngeo1783 |
container_title |
Nature Geoscience |
container_volume |
6 |
container_issue |
5 |
container_start_page |
380 |
op_container_end_page |
384 |
_version_ |
1766251416173674496 |