Lack of bipolar see-saw in response to Southern Ocean wind reduction

A cessation of the Atlantic meridional overturning circulation (AMOC) significantly reduces northward oceanic heat transport. In response to anomalous freshwater flux, this leads to the classic 'bipolar see-saw' pattern of northern cooling and southern warming in surface air and ocean temp...

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Detalles Bibliográficos
Autores: Levermann, A., Schewe, J., Montoya Redondo, María Luisa
Tipo de recurso: artículo
Fecha de publicación:2007
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/51893
Acceso en línea:https://hdl.handle.net/20.500.14352/51893
Access Level:acceso abierto
Palabra clave:52
Meridional overturning circulation
Thermohaline circulation
Climate-change
Intermediate complexity
2nd-order moments
Hemisphere winds
System model
Performance
Greenland
Sensitivity
Astrofísica
Astronomía (Física)
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spelling Lack of bipolar see-saw in response to Southern Ocean wind reductionLevermann, A.Schewe, J.Montoya Redondo, María Luisa52Meridional overturning circulationThermohaline circulationClimate-changeIntermediate complexity2nd-order momentsHemisphere windsSystem modelPerformanceGreenlandSensitivityAstrofísicaAstronomía (Física)A cessation of the Atlantic meridional overturning circulation (AMOC) significantly reduces northward oceanic heat transport. In response to anomalous freshwater flux, this leads to the classic 'bipolar see-saw' pattern of northern cooling and southern warming in surface air and ocean temperatures. By contrast, as shown here in a coupled climate model, both northern and southern cooling are observed for an AMOC reduction in response to reduced wind stress in the Southern Ocean (SO). For very weak SO wind stress, not only the overturning circulation collapses, but sea ice export from the SO is strongly reduced. Consequently, sea ice extent and albedo increase in this region. The resulting cooling overcompensates the warming by the reduced northward heat transport. The effect depends continuously on changes in wind stress and is reversed for increased winds. It may have consequences for abrupt climate change, the last deglaciation and climate sensitivity to increasing atmospheric CO_2 concentration.American Geophysical UnionUniversidad Complutense de Madrid20072007-06-2820072007-06-28journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/51893reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/518932026-06-02T12:44:21Z
dc.title.none.fl_str_mv Lack of bipolar see-saw in response to Southern Ocean wind reduction
title Lack of bipolar see-saw in response to Southern Ocean wind reduction
spellingShingle Lack of bipolar see-saw in response to Southern Ocean wind reduction
Levermann, A.
52
Meridional overturning circulation
Thermohaline circulation
Climate-change
Intermediate complexity
2nd-order moments
Hemisphere winds
System model
Performance
Greenland
Sensitivity
Astrofísica
Astronomía (Física)
title_short Lack of bipolar see-saw in response to Southern Ocean wind reduction
title_full Lack of bipolar see-saw in response to Southern Ocean wind reduction
title_fullStr Lack of bipolar see-saw in response to Southern Ocean wind reduction
title_full_unstemmed Lack of bipolar see-saw in response to Southern Ocean wind reduction
title_sort Lack of bipolar see-saw in response to Southern Ocean wind reduction
dc.creator.none.fl_str_mv Levermann, A.
Schewe, J.
Montoya Redondo, María Luisa
author Levermann, A.
author_facet Levermann, A.
Schewe, J.
Montoya Redondo, María Luisa
author_role author
author2 Schewe, J.
Montoya Redondo, María Luisa
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Meridional overturning circulation
Thermohaline circulation
Climate-change
Intermediate complexity
2nd-order moments
Hemisphere winds
System model
Performance
Greenland
Sensitivity
Astrofísica
Astronomía (Física)
topic 52
Meridional overturning circulation
Thermohaline circulation
Climate-change
Intermediate complexity
2nd-order moments
Hemisphere winds
System model
Performance
Greenland
Sensitivity
Astrofísica
Astronomía (Física)
description A cessation of the Atlantic meridional overturning circulation (AMOC) significantly reduces northward oceanic heat transport. In response to anomalous freshwater flux, this leads to the classic 'bipolar see-saw' pattern of northern cooling and southern warming in surface air and ocean temperatures. By contrast, as shown here in a coupled climate model, both northern and southern cooling are observed for an AMOC reduction in response to reduced wind stress in the Southern Ocean (SO). For very weak SO wind stress, not only the overturning circulation collapses, but sea ice export from the SO is strongly reduced. Consequently, sea ice extent and albedo increase in this region. The resulting cooling overcompensates the warming by the reduced northward heat transport. The effect depends continuously on changes in wind stress and is reversed for increased winds. It may have consequences for abrupt climate change, the last deglaciation and climate sensitivity to increasing atmospheric CO_2 concentration.
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-06-28
2007
2007-06-28
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/51893
url https://hdl.handle.net/20.500.14352/51893
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869423939887824896
score 15,300724

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