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...

Full description

Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Patara, Lavinia, Böning, Claus W.
Format: Article in Journal/Newspaper
Language:English
Published: AGU (American Geophysical Union) 2014
Subjects:
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
id ftoceanrep:oai:oceanrep.geomar.de:24754
record_format openpolar
spelling 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