Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans

The thermocline is defined as the ocean layer for which the vertical thermal gradient is maximum. In the equatorial ocean, observations led to the use of the 20 °C isotherm depth (z20) as an estimate of the thermocline. This study compares z20 against the physical thermocline in the equatorial Atlan...

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Detalles Bibliográficos
Autores: Castaño Tierno, Antonio, Mohino Harris, Elsa, Rodríguez De Fonseca, María Belén, Losada Doval, Teresa
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/13274
Acceso en línea:https://hdl.handle.net/20.500.14352/13274
Access Level:acceso abierto
Palabra clave:52
Tropical atlantic
Cold-tongue
SST biases
Models
Variability
Circulation
Física atmosférica
2501 Ciencias de la Atmósfera
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oai_identifier_str oai:docta.ucm.es:20.500.14352/13274
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repository_id_str
spelling Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic OceansCastaño Tierno, AntonioMohino Harris, ElsaRodríguez De Fonseca, María BelénLosada Doval, Teresa52Tropical atlanticCold-tongueSST biasesModelsVariabilityCirculationFísica atmosférica2501 Ciencias de la AtmósferaThe thermocline is defined as the ocean layer for which the vertical thermal gradient is maximum. In the equatorial ocean, observations led to the use of the 20 °C isotherm depth (z20) as an estimate of the thermocline. This study compares z20 against the physical thermocline in the equatorial Atlantic and Pacific Oceans, using Simple Ocean Data Assimilation reanalysis and fifth phase of the Coupled Model Intercomparison Project preindustrial control simulations. Our results show that z20 is systematically deeper and flatter than the thermocline and does not respond correctly to surface wind stress variations. It is also shown that the annual cycle of z20 is much weaker than that of the physical thermocline. This happens in both equatorial basins and indicates that z20 does not react to the same mechanisms as the thermocline. This could have important consequences in the assessment of air-sea coupling in current general circulation models and bias reduction strategies.Amer Physical SocUniversidad Complutense de Madrid20182018-12-1620182018-12-16journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/13274reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/132742026-06-02T12:44:21Z
dc.title.none.fl_str_mv Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
title Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
spellingShingle Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
Castaño Tierno, Antonio
52
Tropical atlantic
Cold-tongue
SST biases
Models
Variability
Circulation
Física atmosférica
2501 Ciencias de la Atmósfera
title_short Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
title_full Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
title_fullStr Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
title_full_unstemmed Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
title_sort Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans
dc.creator.none.fl_str_mv Castaño Tierno, Antonio
Mohino Harris, Elsa
Rodríguez De Fonseca, María Belén
Losada Doval, Teresa
author Castaño Tierno, Antonio
author_facet Castaño Tierno, Antonio
Mohino Harris, Elsa
Rodríguez De Fonseca, María Belén
Losada Doval, Teresa
author_role author
author2 Mohino Harris, Elsa
Rodríguez De Fonseca, María Belén
Losada Doval, Teresa
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Tropical atlantic
Cold-tongue
SST biases
Models
Variability
Circulation
Física atmosférica
2501 Ciencias de la Atmósfera
topic 52
Tropical atlantic
Cold-tongue
SST biases
Models
Variability
Circulation
Física atmosférica
2501 Ciencias de la Atmósfera
description The thermocline is defined as the ocean layer for which the vertical thermal gradient is maximum. In the equatorial ocean, observations led to the use of the 20 °C isotherm depth (z20) as an estimate of the thermocline. This study compares z20 against the physical thermocline in the equatorial Atlantic and Pacific Oceans, using Simple Ocean Data Assimilation reanalysis and fifth phase of the Coupled Model Intercomparison Project preindustrial control simulations. Our results show that z20 is systematically deeper and flatter than the thermocline and does not respond correctly to surface wind stress variations. It is also shown that the annual cycle of z20 is much weaker than that of the physical thermocline. This happens in both equatorial basins and indicates that z20 does not react to the same mechanisms as the thermocline. This could have important consequences in the assessment of air-sea coupling in current general circulation models and bias reduction strategies.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-12-16
2018
2018-12-16
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/20.500.14352/13274
url https://hdl.handle.net/20.500.14352/13274
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 Amer Physical Soc
publisher.none.fl_str_mv Amer Physical Soc
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 15,300719

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