Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene
Paleo-simulations of atmosphere-ocean circulation are not only an indispensable tool for understanding former climate conditions. It also impacts on other research areas, such as the investigation of the development of shelf areas or the reconstruction of topography.We model the dynamical state of a...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_247239 2023-05-15T13:40:18+02:00 Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene Weber, T. Thomas, M. Matthes, K. 2013 https://gfzpublic.gfz-potsdam.de/pubman/item/item_247239 unknown https://gfzpublic.gfz-potsdam.de/pubman/item/item_247239 Geophysical Research Abstracts, Vol. 15, EGU2013-11759 550 - Earth sciences info:eu-repo/semantics/conferenceObject 2013 ftgfzpotsdam 2022-09-14T05:53:53Z Paleo-simulations of atmosphere-ocean circulation are not only an indispensable tool for understanding former climate conditions. It also impacts on other research areas, such as the investigation of the development of shelf areas or the reconstruction of topography.We model the dynamical state of atmosphere and oceans both separately and in a coupled mode for the Pliocene and pre-industrial times, using the atmosphere model ECHAM5 and the ocean model MPIOM. In comparison, the Pliocene has a globally warmer (2.2C) and slightly drier (1.4 cm/yr) climate than today. South America and Africa are both colder (4C) and drier (6 cm/yr), evoked mainly by changes in vegetation type and density. This explanation is supported by the fact that the composition of the atmosphere, the solar radiance and the land-sea distribution are similar in both time-slices for these regions. Changes in oceanic currents are strongly influenced by the opening of the Straight of Panama and a decreased meridional temperature gradient. This leads to a weakening of the Atlantic Meridional Overturning Circulation (AMOC) and the Antarctic Circumpolar Current (ACC) during the Pliocene in comparison to nowadays. Conference Object Antarc* Antarctic GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic |
institution |
Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
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ftgfzpotsdam |
language |
unknown |
topic |
550 - Earth sciences |
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550 - Earth sciences Weber, T. Thomas, M. Matthes, K. Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene |
topic_facet |
550 - Earth sciences |
description |
Paleo-simulations of atmosphere-ocean circulation are not only an indispensable tool for understanding former climate conditions. It also impacts on other research areas, such as the investigation of the development of shelf areas or the reconstruction of topography.We model the dynamical state of atmosphere and oceans both separately and in a coupled mode for the Pliocene and pre-industrial times, using the atmosphere model ECHAM5 and the ocean model MPIOM. In comparison, the Pliocene has a globally warmer (2.2C) and slightly drier (1.4 cm/yr) climate than today. South America and Africa are both colder (4C) and drier (6 cm/yr), evoked mainly by changes in vegetation type and density. This explanation is supported by the fact that the composition of the atmosphere, the solar radiance and the land-sea distribution are similar in both time-slices for these regions. Changes in oceanic currents are strongly influenced by the opening of the Straight of Panama and a decreased meridional temperature gradient. This leads to a weakening of the Atlantic Meridional Overturning Circulation (AMOC) and the Antarctic Circumpolar Current (ACC) during the Pliocene in comparison to nowadays. |
format |
Conference Object |
author |
Weber, T. Thomas, M. Matthes, K. |
author_facet |
Weber, T. Thomas, M. Matthes, K. |
author_sort |
Weber, T. |
title |
Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene |
title_short |
Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene |
title_full |
Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene |
title_fullStr |
Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene |
title_full_unstemmed |
Modeling atmosphere-ocean circulation in the South Atlantic during the Pliocene |
title_sort |
modeling atmosphere-ocean circulation in the south atlantic during the pliocene |
publishDate |
2013 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_247239 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geophysical Research Abstracts, Vol. 15, EGU2013-11759 |
op_relation |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_247239 |
_version_ |
1766132009129738240 |