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 dynamic...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/306035 2023-07-23T04:13:49+02:00 Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow Rugenstein, Maria Stocchi, Paolo von der Heydt, Anna Dijkstra, Hendrik Brinkhuis, Henk Sub Physical Oceanography Marine palynology and palaeoceanography Marine and Atmospheric Research Marine Palynology 2014-07-01 application/pdf https://dspace.library.uu.nl/handle/1874/306035 en eng 0921-8181 https://dspace.library.uu.nl/handle/1874/306035 info:eu-repo/semantics/EmbargoedAccess Antarctic ice sheet Ice load Southern Ocean Eocene–Oligocene Frontal shifts Article 2014 ftunivutrecht 2023-07-02T01:10:31Z 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 inmean 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 Utrecht University Repository Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Antarctic ice sheet Ice load Southern Ocean Eocene–Oligocene Frontal shifts |
spellingShingle |
Antarctic ice sheet Ice load Southern Ocean Eocene–Oligocene Frontal shifts Rugenstein, Maria Stocchi, Paolo von der Heydt, Anna Dijkstra, Hendrik Brinkhuis, Henk Emplacement of Antarctic ice sheet mass affects circumpolar ocean flow |
topic_facet |
Antarctic ice sheet Ice load Southern Ocean Eocene–Oligocene Frontal shifts |
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 inmean 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. |
author2 |
Sub Physical Oceanography Marine palynology and palaeoceanography Marine and Atmospheric Research Marine Palynology |
format |
Article in Journal/Newspaper |
author |
Rugenstein, Maria Stocchi, Paolo von der Heydt, Anna Dijkstra, Hendrik Brinkhuis, Henk |
author_facet |
Rugenstein, Maria Stocchi, Paolo von der Heydt, Anna Dijkstra, Hendrik Brinkhuis, Henk |
author_sort |
Rugenstein, Maria |
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 |
https://dspace.library.uu.nl/handle/1874/306035 |
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_relation |
0921-8181 https://dspace.library.uu.nl/handle/1874/306035 |
op_rights |
info:eu-repo/semantics/EmbargoedAccess |
_version_ |
1772181647361310720 |