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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ftnioz:oai:imis.nioz.nl:230835 2023-05-15T13:47:57+02:00 Relative sea-level rise around East Antarctica during Oligocene glaciation Stocchi, P. Escutia, C. Houben, A.J.P. Vermeersen, B.L.A. Bijl, P.K. Brinkhuis, H. DeConto, R.M. Galeotti, S. Passchier, S. Pollard, D. IODP Expedition 318 Scientists 2013 http://imis.nioz.nl/imis.php?module=ref&refid=230835 en eng info:eu-repo/semantics/altIdentifier/wos/000318227000019 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1038/NGEO1783 http://imis.nioz.nl/imis.php?module=ref&refid=230835 info:eu-repo/semantics/closedAccess %3Ci%3ENature+Geoscience+6%285%29%3C%2Fi%3E%3A+380-384.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1038%2FNGEO1783%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1038%2FNGEO1783%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftnioz https://doi.org/10.1038/NGEO1783 2022-05-01T13:56:27Z 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 NIOZ Repository (Royal Netherlands Institute for Sea Research) Antarctic East Antarctica The Antarctic Nature Geoscience 6 5 380 384 |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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English |
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. |
format |
Article in Journal/Newspaper |
author |
Stocchi, P. Escutia, C. Houben, A.J.P. Vermeersen, B.L.A. Bijl, P.K. Brinkhuis, H. DeConto, R.M. Galeotti, S. Passchier, S. Pollard, D. IODP Expedition 318 Scientists |
spellingShingle |
Stocchi, P. Escutia, C. Houben, A.J.P. Vermeersen, B.L.A. Bijl, P.K. Brinkhuis, H. DeConto, R.M. Galeotti, S. Passchier, S. Pollard, D. IODP Expedition 318 Scientists Relative sea-level rise around East Antarctica during Oligocene glaciation |
author_facet |
Stocchi, P. Escutia, C. Houben, A.J.P. Vermeersen, B.L.A. Bijl, P.K. Brinkhuis, H. DeConto, R.M. Galeotti, S. Passchier, S. Pollard, D. IODP Expedition 318 Scientists |
author_sort |
Stocchi, P. |
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://imis.nioz.nl/imis.php?module=ref&refid=230835 |
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_source |
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info:eu-repo/semantics/altIdentifier/wos/000318227000019 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1038/NGEO1783 http://imis.nioz.nl/imis.php?module=ref&refid=230835 |
op_rights |
info:eu-repo/semantics/closedAccess |
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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1766248034174238720 |