Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation

Possible changes in Atlantic meridional overturning circulation (AMOC) provide a key source of uncertainty regarding future climate change. Maps of temperature trends over the twentieth century show a conspicuous region of cooling in the northern Atlantic. Here we present multiple lines of evidence...

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Detalles Bibliográficos
Autores: Rahmstorf, Stefan, Box, Jason E., Feulner, Georg, Mann, Michael E., Robinson, Alexander James, Rutherford, Scott, Schaffernicht, Erik J.
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/24108
Acceso en línea:https://hdl.handle.net/20.500.14352/24108
Access Level:acceso abierto
Palabra clave:52
Sea-surface temperature
North-Atlantic
Thermohaline circulation
Climate-change
Salinity
Variability
Millennium
Hemisphere
Discharge
Decline
Astrofísica
Astronomía (Física)
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oai_identifier_str oai:docta.ucm.es:20.500.14352/24108
network_acronym_str ES
network_name_str España
repository_id_str
spelling Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulationRahmstorf, StefanBox, Jason E.Feulner, GeorgMann, Michael E.Robinson, Alexander JamesRutherford, ScottSchaffernicht, Erik J.52Sea-surface temperatureNorth-AtlanticThermohaline circulationClimate-changeSalinityVariabilityMillenniumHemisphereDischargeDeclineAstrofísicaAstronomía (Física)Possible changes in Atlantic meridional overturning circulation (AMOC) provide a key source of uncertainty regarding future climate change. Maps of temperature trends over the twentieth century show a conspicuous region of cooling in the northern Atlantic. Here we present multiple lines of evidence suggesting that this cooling may be due to a reduction in the AMOC over the twentieth century and particularly after 1970. Since 1990 the AMOC seems to have partly recovered. This time evolution is consistently suggested by an AMOC index based on sea surface temperatures, by the hemispheric temperature difference, by coral-based proxies and by oceanic measurements. We discuss a possible contribution of the melting of the Greenland Ice Sheet to the slowdown. Using a multi-proxy temperature reconstruction for the AMOC index suggests that the AMOC weakness after 1975 is an unprecedented event in the past millennium (p > 0.99). Further melting of Greenland in the coming decades could contribute to further weakening of the AMOC.Nature Publishing GroupUniversidad Complutense de Madrid20152015-05-0120152015-05-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/24108reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/241082026-06-02T12:44:21Z
dc.title.none.fl_str_mv Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
title Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
spellingShingle Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
Rahmstorf, Stefan
52
Sea-surface temperature
North-Atlantic
Thermohaline circulation
Climate-change
Salinity
Variability
Millennium
Hemisphere
Discharge
Decline
Astrofísica
Astronomía (Física)
title_short Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
title_full Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
title_fullStr Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
title_full_unstemmed Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
title_sort Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
dc.creator.none.fl_str_mv Rahmstorf, Stefan
Box, Jason E.
Feulner, Georg
Mann, Michael E.
Robinson, Alexander James
Rutherford, Scott
Schaffernicht, Erik J.
author Rahmstorf, Stefan
author_facet Rahmstorf, Stefan
Box, Jason E.
Feulner, Georg
Mann, Michael E.
Robinson, Alexander James
Rutherford, Scott
Schaffernicht, Erik J.
author_role author
author2 Box, Jason E.
Feulner, Georg
Mann, Michael E.
Robinson, Alexander James
Rutherford, Scott
Schaffernicht, Erik J.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Sea-surface temperature
North-Atlantic
Thermohaline circulation
Climate-change
Salinity
Variability
Millennium
Hemisphere
Discharge
Decline
Astrofísica
Astronomía (Física)
topic 52
Sea-surface temperature
North-Atlantic
Thermohaline circulation
Climate-change
Salinity
Variability
Millennium
Hemisphere
Discharge
Decline
Astrofísica
Astronomía (Física)
description Possible changes in Atlantic meridional overturning circulation (AMOC) provide a key source of uncertainty regarding future climate change. Maps of temperature trends over the twentieth century show a conspicuous region of cooling in the northern Atlantic. Here we present multiple lines of evidence suggesting that this cooling may be due to a reduction in the AMOC over the twentieth century and particularly after 1970. Since 1990 the AMOC seems to have partly recovered. This time evolution is consistently suggested by an AMOC index based on sea surface temperatures, by the hemispheric temperature difference, by coral-based proxies and by oceanic measurements. We discuss a possible contribution of the melting of the Greenland Ice Sheet to the slowdown. Using a multi-proxy temperature reconstruction for the AMOC index suggests that the AMOC weakness after 1975 is an unprecedented event in the past millennium (p > 0.99). Further melting of Greenland in the coming decades could contribute to further weakening of the AMOC.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-05-01
2015
2015-05-01
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/20.500.14352/24108
url https://hdl.handle.net/20.500.14352/24108
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 Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
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
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score 15,300724

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