Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation
The abyssal warming around Antarctica is one of the most prominent multidecadal signals of change in the global ocean. Here we investigate its dynamical impacts on the Atlantic Meridional Overturning Circulation (AMOC) by performing a set of experiments with the ocean-sea ice model NEMO-LIM2 at 1/2...
Published in: | Geophysical Research Letters |
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Language: | English |
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AGU (American Geophysical Union)
2014
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Online Access: | https://oceanrep.geomar.de/id/eprint/24754/ https://oceanrep.geomar.de/id/eprint/24754/1/grl51739.pdf https://oceanrep.geomar.de/id/eprint/24754/6/2014GL059923R_Auxiliary_material_Readme.docx https://oceanrep.geomar.de/id/eprint/24754/2/2014GL059923Rfs01.eps https://oceanrep.geomar.de/id/eprint/24754/3/2014GL059923Rfs02.eps https://oceanrep.geomar.de/id/eprint/24754/7/2014GL059923Rfs03.eps https://oceanrep.geomar.de/id/eprint/24754/5/2014GL059923Rfs04.eps https://doi.org/10.1002/2014GL059923 |
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ftoceanrep:oai:oceanrep.geomar.de:24754 2023-05-15T13:51:48+02:00 Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation Patara, Lavinia Böning, Claus W. 2014-06-16 text other https://oceanrep.geomar.de/id/eprint/24754/ https://oceanrep.geomar.de/id/eprint/24754/1/grl51739.pdf https://oceanrep.geomar.de/id/eprint/24754/6/2014GL059923R_Auxiliary_material_Readme.docx https://oceanrep.geomar.de/id/eprint/24754/2/2014GL059923Rfs01.eps https://oceanrep.geomar.de/id/eprint/24754/3/2014GL059923Rfs02.eps https://oceanrep.geomar.de/id/eprint/24754/7/2014GL059923Rfs03.eps https://oceanrep.geomar.de/id/eprint/24754/5/2014GL059923Rfs04.eps https://doi.org/10.1002/2014GL059923 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/24754/1/grl51739.pdf https://oceanrep.geomar.de/id/eprint/24754/6/2014GL059923R_Auxiliary_material_Readme.docx https://oceanrep.geomar.de/id/eprint/24754/2/2014GL059923Rfs01.eps https://oceanrep.geomar.de/id/eprint/24754/3/2014GL059923Rfs02.eps https://oceanrep.geomar.de/id/eprint/24754/7/2014GL059923Rfs03.eps https://oceanrep.geomar.de/id/eprint/24754/5/2014GL059923Rfs04.eps Patara, L. and Böning, C. W. (2014) Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation. Open Access Geophysical Research Letters, 41 (11). pp. 3972-3978. DOI 10.1002/2014GL059923 <https://doi.org/10.1002/2014GL059923>. doi:10.1002/2014GL059923 info:eu-repo/semantics/openAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1002/2014GL059923 2023-04-07T15:13:38Z The abyssal warming around Antarctica is one of the most prominent multidecadal signals of change in the global ocean. Here we investigate its dynamical impacts on the Atlantic Meridional Overturning Circulation (AMOC) by performing a set of experiments with the ocean-sea ice model NEMO-LIM2 at 1/2 degrees horizontal resolution. The simulations suggest that the ongoing warming of Antarctic Bottom Water (AABW), already affecting much of the Southern Hemisphere with a rate of up to 0.05 degrees C decade(-1), has important implications for the large-scale meridional overturning circulation in the Atlantic Ocean. While the abyssal northward flow of AABW is weakening, we find the upper AMOC cell to progressively strengthen by 5-10% in response to deep density changes in the South Atlantic. The simulations suggest that the AABW-induced strengthening of the AMOC is already extending into the subtropical North Atlantic, implying that the process may counteract the projected decrease of the AMOC in the next decades. Article in Journal/Newspaper Antarc* Antarctic Antarctica North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Geophysical Research Letters 41 11 3972 3978 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The abyssal warming around Antarctica is one of the most prominent multidecadal signals of change in the global ocean. Here we investigate its dynamical impacts on the Atlantic Meridional Overturning Circulation (AMOC) by performing a set of experiments with the ocean-sea ice model NEMO-LIM2 at 1/2 degrees horizontal resolution. The simulations suggest that the ongoing warming of Antarctic Bottom Water (AABW), already affecting much of the Southern Hemisphere with a rate of up to 0.05 degrees C decade(-1), has important implications for the large-scale meridional overturning circulation in the Atlantic Ocean. While the abyssal northward flow of AABW is weakening, we find the upper AMOC cell to progressively strengthen by 5-10% in response to deep density changes in the South Atlantic. The simulations suggest that the AABW-induced strengthening of the AMOC is already extending into the subtropical North Atlantic, implying that the process may counteract the projected decrease of the AMOC in the next decades. |
format |
Article in Journal/Newspaper |
author |
Patara, Lavinia Böning, Claus W. |
spellingShingle |
Patara, Lavinia Böning, Claus W. Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation |
author_facet |
Patara, Lavinia Böning, Claus W. |
author_sort |
Patara, Lavinia |
title |
Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation |
title_short |
Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation |
title_full |
Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation |
title_fullStr |
Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation |
title_full_unstemmed |
Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation |
title_sort |
abyssal ocean warming around antarctica strengthens the atlantic overturning circulation |
publisher |
AGU (American Geophysical Union) |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/24754/ https://oceanrep.geomar.de/id/eprint/24754/1/grl51739.pdf https://oceanrep.geomar.de/id/eprint/24754/6/2014GL059923R_Auxiliary_material_Readme.docx https://oceanrep.geomar.de/id/eprint/24754/2/2014GL059923Rfs01.eps https://oceanrep.geomar.de/id/eprint/24754/3/2014GL059923Rfs02.eps https://oceanrep.geomar.de/id/eprint/24754/7/2014GL059923Rfs03.eps https://oceanrep.geomar.de/id/eprint/24754/5/2014GL059923Rfs04.eps https://doi.org/10.1002/2014GL059923 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica North Atlantic Sea ice |
genre_facet |
Antarc* Antarctic Antarctica North Atlantic Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/24754/1/grl51739.pdf https://oceanrep.geomar.de/id/eprint/24754/6/2014GL059923R_Auxiliary_material_Readme.docx https://oceanrep.geomar.de/id/eprint/24754/2/2014GL059923Rfs01.eps https://oceanrep.geomar.de/id/eprint/24754/3/2014GL059923Rfs02.eps https://oceanrep.geomar.de/id/eprint/24754/7/2014GL059923Rfs03.eps https://oceanrep.geomar.de/id/eprint/24754/5/2014GL059923Rfs04.eps Patara, L. and Böning, C. W. (2014) Abyssal ocean warming around Antarctica strengthens the Atlantic overturning circulation. Open Access Geophysical Research Letters, 41 (11). pp. 3972-3978. DOI 10.1002/2014GL059923 <https://doi.org/10.1002/2014GL059923>. doi:10.1002/2014GL059923 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2014GL059923 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
11 |
container_start_page |
3972 |
op_container_end_page |
3978 |
_version_ |
1766255832009277440 |