Relative sea-level rise around East Antarctica during Oligocene glaciation
During the middle and late Eocene (similar to 48-34 Myr ago), the Earth's climate cooled(1,2) and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarctica(3,4) induced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea l...
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Online Access: | http://hdl.handle.net/11576/2566974 https://doi.org/10.1038/NGEO1783 |
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ftunivurbino:oai:ora.uniurb.it:11576/2566974 2024-04-14T08:02:03+00:00 Relative sea-level rise around East Antarctica during Oligocene glaciation P. Stocchi C. Escutia A. J. P. Houben B. L. A. Vermeersen P. K. Bijl H. Brinkhuis R. M. DeConto GALEOTTI, SIMONE S. Passchier D. Pollard IODP Expedition 318 Scientists P., Stocchi C., Escutia A. J. P., Houben B. L. A., Vermeersen P. K., Bijl H., Brinkhui R. M., Deconto Galeotti, Simone S., Passchier D., Pollard IODP Expedition 318, Scientists 2013 STAMPA http://hdl.handle.net/11576/2566974 https://doi.org/10.1038/NGEO1783 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000318227000019 volume:6 issue:5 firstpage:380 lastpage:384 numberofpages:5 journal:NATURE GEOSCIENCE http://hdl.handle.net/11576/2566974 doi:10.1038/NGEO1783 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84877249297 info:eu-repo/semantics/article 2013 ftunivurbino https://doi.org/10.1038/NGEO1783 2024-03-21T17:01:51Z During the middle and late Eocene (similar to 48-34 Myr ago), the Earth's climate cooled(1,2) and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarctica(3,4) induced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea level rose(5,6) despite 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(7) 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(8) that near-field processes such as local sea-level change influence the equilibrium state obtained by an ice-sheet grounding line. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Università degli Studi di Urbino: CINECA IRIS Antarctic The Antarctic East Antarctica Nature Geoscience 6 5 380 384 |
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Università degli Studi di Urbino: CINECA IRIS |
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ftunivurbino |
language |
unknown |
description |
During the middle and late Eocene (similar to 48-34 Myr ago), the Earth's climate cooled(1,2) and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarctica(3,4) induced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea level rose(5,6) despite 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(7) 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(8) that near-field processes such as local sea-level change influence the equilibrium state obtained by an ice-sheet grounding line. |
author2 |
P., Stocchi C., Escutia A. J. P., Houben B. L. A., Vermeersen P. K., Bijl H., Brinkhui R. M., Deconto Galeotti, Simone S., Passchier D., Pollard IODP Expedition 318, Scientists |
format |
Article in Journal/Newspaper |
author |
P. Stocchi C. Escutia A. J. P. Houben B. L. A. Vermeersen P. K. Bijl H. Brinkhuis R. M. DeConto GALEOTTI, SIMONE S. Passchier D. Pollard IODP Expedition 318 Scientists |
spellingShingle |
P. Stocchi C. Escutia A. J. P. Houben B. L. A. Vermeersen P. K. Bijl H. Brinkhuis R. M. DeConto GALEOTTI, SIMONE S. Passchier D. Pollard IODP Expedition 318 Scientists Relative sea-level rise around East Antarctica during Oligocene glaciation |
author_facet |
P. Stocchi C. Escutia A. J. P. Houben B. L. A. Vermeersen P. K. Bijl H. Brinkhuis R. M. DeConto GALEOTTI, SIMONE S. Passchier D. Pollard IODP Expedition 318 Scientists |
author_sort |
P. Stocchi |
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 |
publishDate |
2013 |
url |
http://hdl.handle.net/11576/2566974 https://doi.org/10.1038/NGEO1783 |
geographic |
Antarctic The Antarctic East Antarctica |
geographic_facet |
Antarctic The Antarctic East Antarctica |
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:000318227000019 volume:6 issue:5 firstpage:380 lastpage:384 numberofpages:5 journal:NATURE GEOSCIENCE http://hdl.handle.net/11576/2566974 doi:10.1038/NGEO1783 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84877249297 |
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 |
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