Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model

The ECHAM-1 T21/LSG coupled ocean-atmosphere general circulation model (GCM) is used to simulate climatic conditions at the last interglacial maximum (Eemian. 125 kyr BP). The results reflect thc expected surface temperature changes (with respect to the control run) due to the amplification (reducti...

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Detalles Bibliográficos
Autores: Montoya Redondo, María Luisa, von Storch, H., Crowley, T. J.
Tipo de recurso: artículo
Fecha de publicación:2000
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/59992
Acceso en línea:https://hdl.handle.net/20.500.14352/59992
Access Level:acceso abierto
Palabra clave:52
Last glacial maximum
Deep-water circulation
Vostok ice core
Pollen record
Sea-level
Transient responses
African monsoon
Middle holocene
Gradual changes
GCM simulation
Astrofísica
Astronomía (Física)
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spelling Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation modelMontoya Redondo, María Luisavon Storch, H.Crowley, T. J.52Last glacial maximumDeep-water circulationVostok ice corePollen recordSea-levelTransient responsesAfrican monsoonMiddle holoceneGradual changesGCM simulationAstrofísicaAstronomía (Física)The ECHAM-1 T21/LSG coupled ocean-atmosphere general circulation model (GCM) is used to simulate climatic conditions at the last interglacial maximum (Eemian. 125 kyr BP). The results reflect thc expected surface temperature changes (with respect to the control run) due to the amplification (reduction) of the seasonal cycle of insolation in the Northern (Southern) Hemisphere. A number of simulated features agree with previous results from atmospheric GCM simulations e.g. intensified summer southwest monsoons) except in the Northern Hemisphere poleward of 30 degrees N. where dynamical feedback, in the North Atlantic and North Pacific increase zonal temperatures about 1 degrees C above what would be predicted from simple energy balance considerations. As this is the same area where most of the terrestrial geological data originate, this result suggests that previous estimates of Eemian global average temperature might have been biased by sample distribution. This conclusion is supported by the fact that the estimated global temperature increase of only 0.3 degrees C greater than the control run ha, been previously shown to be consistent a with CLIMAP sea surface temperature estimates. Although the Northern Hemisphere summer monsoon is intensified. globally averaged precipitation over land is within about 1% of the present, contravening some geological inferences bur not the deep-sea delta(13)C estimates of terrestrial carbon storage changes. Winter circulation changes in the northern Arabian Sea. driven by strong cooling on land, are as large as summer circulation changes that are the usual focus of interest, suggesting that interpreting variations in the Arabian Sea. sedimentary record solely in terms of the summer monsoon response could sometimes lead to errors. A small monsoonal response over northern South America suggests that interglacial paleotrends in this region were not just due to El Nino variations.American Meteorological SocietyUniversidad Complutense de Madrid20002000-03-1520002000-03-15journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/59992reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/599922026-06-02T12:44:21Z
dc.title.none.fl_str_mv Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
title Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
spellingShingle Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
Montoya Redondo, María Luisa
52
Last glacial maximum
Deep-water circulation
Vostok ice core
Pollen record
Sea-level
Transient responses
African monsoon
Middle holocene
Gradual changes
GCM simulation
Astrofísica
Astronomía (Física)
title_short Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
title_full Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
title_fullStr Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
title_full_unstemmed Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
title_sort Climate simulation for 125 kyr BP with a coupled ocean-atmosphere general circulation model
dc.creator.none.fl_str_mv Montoya Redondo, María Luisa
von Storch, H.
Crowley, T. J.
author Montoya Redondo, María Luisa
author_facet Montoya Redondo, María Luisa
von Storch, H.
Crowley, T. J.
author_role author
author2 von Storch, H.
Crowley, T. J.
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Last glacial maximum
Deep-water circulation
Vostok ice core
Pollen record
Sea-level
Transient responses
African monsoon
Middle holocene
Gradual changes
GCM simulation
Astrofísica
Astronomía (Física)
topic 52
Last glacial maximum
Deep-water circulation
Vostok ice core
Pollen record
Sea-level
Transient responses
African monsoon
Middle holocene
Gradual changes
GCM simulation
Astrofísica
Astronomía (Física)
description The ECHAM-1 T21/LSG coupled ocean-atmosphere general circulation model (GCM) is used to simulate climatic conditions at the last interglacial maximum (Eemian. 125 kyr BP). The results reflect thc expected surface temperature changes (with respect to the control run) due to the amplification (reduction) of the seasonal cycle of insolation in the Northern (Southern) Hemisphere. A number of simulated features agree with previous results from atmospheric GCM simulations e.g. intensified summer southwest monsoons) except in the Northern Hemisphere poleward of 30 degrees N. where dynamical feedback, in the North Atlantic and North Pacific increase zonal temperatures about 1 degrees C above what would be predicted from simple energy balance considerations. As this is the same area where most of the terrestrial geological data originate, this result suggests that previous estimates of Eemian global average temperature might have been biased by sample distribution. This conclusion is supported by the fact that the estimated global temperature increase of only 0.3 degrees C greater than the control run ha, been previously shown to be consistent a with CLIMAP sea surface temperature estimates. Although the Northern Hemisphere summer monsoon is intensified. globally averaged precipitation over land is within about 1% of the present, contravening some geological inferences bur not the deep-sea delta(13)C estimates of terrestrial carbon storage changes. Winter circulation changes in the northern Arabian Sea. driven by strong cooling on land, are as large as summer circulation changes that are the usual focus of interest, suggesting that interpreting variations in the Arabian Sea. sedimentary record solely in terms of the summer monsoon response could sometimes lead to errors. A small monsoonal response over northern South America suggests that interglacial paleotrends in this region were not just due to El Nino variations.
publishDate 2000
dc.date.none.fl_str_mv 2000
2000-03-15
2000
2000-03-15
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/20.500.14352/59992
url https://hdl.handle.net/20.500.14352/59992
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 Meteorological Society
publisher.none.fl_str_mv American Meteorological Society
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 15,301603

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