Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow
During the Cenozoic the Antarctic continent experienced large fluctuations in ice-sheet volume. We investigate the effects of Glacial Isostatic Adjustment (GIA) on Southern Ocean circulation for the first continental scale glaciation of Antarctica (~ 34 Myr) by combining solid Earth and ocean dynami...
Published in: | Global and Planetary Change |
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Format: | Article in Journal/Newspaper |
Language: | English |
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ftnioz:oai:imis.nioz.nl:240827 2023-05-15T13:47:57+02:00 Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow Rugenstein, M. Stocchi, P. van der Heydt, A. Brinkhuis, H. 2014 http://imis.nioz.nl/imis.php?module=ref&refid=240827 en eng info:eu-repo/semantics/altIdentifier/wos/000337875900002 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.1016/j.gloplacha.2014.03.011 http://imis.nioz.nl/imis.php?module=ref&refid=240827 info:eu-repo/semantics/closedAccess %3Ci%3EGlobal+Planet.+Change+118%3C%2Fi%3E%3A+16-24.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.gloplacha.2014.03.011%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.gloplacha.2014.03.011%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftnioz https://doi.org/10.1016/j.gloplacha.2014.03.011 2022-05-01T13:59:41Z During the Cenozoic the Antarctic continent experienced large fluctuations in ice-sheet volume. We investigate the effects of Glacial Isostatic Adjustment (GIA) on Southern Ocean circulation for the first continental scale glaciation of Antarctica (~ 34 Myr) by combining solid Earth and ocean dynamic modeling. A newly compiled global early Oligocene topography is used to run a solid Earth model forced by a growing Antarctic ice sheet. A regional Southern Ocean zonal isopycnal adiabatic ocean model is run under ice-free and fully glaciated (GIA) conditions. We find that GIA-induced deformations of the sea bottom on the order of 50 m are large enough to affect the pressure and density variations driving the ocean flow around Antarctica. Throughout the Southern Ocean, frontal patterns are shifted several degrees, velocity changes are regionally more than 100%, and the zonal transport decreases in mean and variability. The model analysis suggests that GIA induced ocean flow variations alone could impact local nutrient variability, erosion and sedimentation rates, or ocean heat transport. These effects may be large enough to require consideration when interpreting the results of Southern Ocean sediment cores. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Southern Ocean NIOZ Repository (Royal Netherlands Institute for Sea Research) Antarctic Southern Ocean The Antarctic Global and Planetary Change 118 16 24 |
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Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
During the Cenozoic the Antarctic continent experienced large fluctuations in ice-sheet volume. We investigate the effects of Glacial Isostatic Adjustment (GIA) on Southern Ocean circulation for the first continental scale glaciation of Antarctica (~ 34 Myr) by combining solid Earth and ocean dynamic modeling. A newly compiled global early Oligocene topography is used to run a solid Earth model forced by a growing Antarctic ice sheet. A regional Southern Ocean zonal isopycnal adiabatic ocean model is run under ice-free and fully glaciated (GIA) conditions. We find that GIA-induced deformations of the sea bottom on the order of 50 m are large enough to affect the pressure and density variations driving the ocean flow around Antarctica. Throughout the Southern Ocean, frontal patterns are shifted several degrees, velocity changes are regionally more than 100%, and the zonal transport decreases in mean and variability. The model analysis suggests that GIA induced ocean flow variations alone could impact local nutrient variability, erosion and sedimentation rates, or ocean heat transport. These effects may be large enough to require consideration when interpreting the results of Southern Ocean sediment cores. |
format |
Article in Journal/Newspaper |
author |
Rugenstein, M. Stocchi, P. van der Heydt, A. Brinkhuis, H. |
spellingShingle |
Rugenstein, M. Stocchi, P. van der Heydt, A. Brinkhuis, H. Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
author_facet |
Rugenstein, M. Stocchi, P. van der Heydt, A. Brinkhuis, H. |
author_sort |
Rugenstein, M. |
title |
Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
title_short |
Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
title_full |
Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
title_fullStr |
Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
title_full_unstemmed |
Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
title_sort |
emplacement of antarctic ice sheet mass affects circumpolar ocean flow |
publishDate |
2014 |
url |
http://imis.nioz.nl/imis.php?module=ref&refid=240827 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
op_source |
%3Ci%3EGlobal+Planet.+Change+118%3C%2Fi%3E%3A+16-24.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.gloplacha.2014.03.011%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.gloplacha.2014.03.011%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000337875900002 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.1016/j.gloplacha.2014.03.011 http://imis.nioz.nl/imis.php?module=ref&refid=240827 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2014.03.011 |
container_title |
Global and Planetary Change |
container_volume |
118 |
container_start_page |
16 |
op_container_end_page |
24 |
_version_ |
1766248042236739584 |