Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing

[EN] Previous studies have reported that the tropical Atlantic has had an influence on tropical Pacific interannual variability since the 1970s. This variability is studied in the present work, using simulations from a coupled model in the Indo-Pacific but with observed sea surface temperature (SST)...

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Autores: Martín-Rey, Marta, Polo, Irene, Rodríguez-Fonseca, Belén, Kucharski, F.
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/64227
Acceso en línea:http://hdl.handle.net/10261/64227
Access Level:acceso abierto
Palabra clave:Tropical Atlantic variability
Atlantic-Pacific connection
ENSO
Variabilidad del Atlántico Tropical
Conexión Atlántico-Pacífico
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spelling Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcingCambios en la variabilidad interanual del Pacífico Tropical como respuesta a un forzamiento del Atlántico EcuatorialMartín-Rey, MartaPolo, IreneRodríguez-Fonseca, BelénKucharski, F.Tropical Atlantic variabilityAtlantic-Pacific connectionENSOVariabilidad del Atlántico TropicalConexión Atlántico-Pacífico[EN] Previous studies have reported that the tropical Atlantic has had an influence on tropical Pacific interannual variability since the 1970s. This variability is studied in the present work, using simulations from a coupled model in the Indo-Pacific but with observed sea surface temperature (SST) prescribed over the Atlantic. The interannual variability is compared with that from a control simulation in which climatological SSTs are prescribed over the Atlantic. Differences in the Pacific mean state and in its variability are found in the forced simulation as a response to a warming in the equatorial Atlantic, characterized by a cooler background state and an increase in the variability over the tropical Pacific. A striking result is that the principal modes of tropical Pacific SST interannual variability show significant differences before and after the 1970s, providing new evidence of the Atlantic influence on the Pacific Ocean. Significant cooling (warming) in the equatorial Atlantic could have caused anomalous winds in the central-easter Pacific during the summer since 1970s. The thermocline depth also seems to be altered, triggering the dynamical processes involved in the development of El Niño (La Niña) phenomenon in the following winter. An increase in frequency of Niño and Niña events favouring the Central Pacific (CP) ones is observed in the last three decades. Further analyses using coupled models are still necessary to help us to understand the causes of this inter-basin connection.[ES] Trabajos previos han puesto de manifiesto como el Atlántico Tropical influye en la variabilidad interanual del Pacífico a partir de los años 70. El presente trabajo estudia la variabilidad del Pacífico Tropical a partir de simulaciones realizadas con un modelo acoplado en el Indo-Pacífico que considera la Temperatura de la Superficie del Mar (TSM) observada en el Atlántico como forzamiento externo. Los resultados de esta simulación son comparados con los obtenidos en una simulación de control, con TSM climatológicas en el Atlántico. La simulación forzada muestra cambios en el estado base y la variabilidad del Océano Pacífico relacionados con un calentamiento en el Atlántico ecuatorial, destacando un aumento de la variabilidad y un enfriamiento del Pacífico ecuatorial. Además, los principales modos de variabilidad del Pacífico antes y después de los 70 son diferentes, reafirmándose la influencia del Atlántico sobre el Océano Pacífico. Un enfriamiento (calentamiento) en el Atlántico ecuatorial podría generar vientos anómalos en el centro-este de la cuenca del Pacífico durante el verano desde dicha década. La profundidad de la termoclina también se modificaría, desencadenándose los procesos dinámicos involucrados en el desarrollo de El Niño (La Niña) en el invierno siguiente. Los resultados muestran un aumento de la frecuencia de Niños y Niñas, favoreciéndose los eventos del Centro del Pacífico (CP) en las últimas décadas. Estudios adicionales mediante el uso de modelos acoplados serían necesarios para poder comprender las causas de la conexión entre cuencas.Peer reviewedCSIC - Instituto de Ciencias del Mar (ICM)201320132012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/64227reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3989/scimar.03610.19Ainfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/642272026-05-22T06:33:51Z
dc.title.none.fl_str_mv Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
Cambios en la variabilidad interanual del Pacífico Tropical como respuesta a un forzamiento del Atlántico Ecuatorial
title Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
spellingShingle Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
Martín-Rey, Marta
Tropical Atlantic variability
Atlantic-Pacific connection
ENSO
Variabilidad del Atlántico Tropical
Conexión Atlántico-Pacífico
title_short Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
title_full Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
title_fullStr Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
title_full_unstemmed Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
title_sort Changes in the interannual variability of the tropical Pacific as a response to an equatorial Atlantic forcing
dc.creator.none.fl_str_mv Martín-Rey, Marta
Polo, Irene
Rodríguez-Fonseca, Belén
Kucharski, F.
author Martín-Rey, Marta
author_facet Martín-Rey, Marta
Polo, Irene
Rodríguez-Fonseca, Belén
Kucharski, F.
author_role author
author2 Polo, Irene
Rodríguez-Fonseca, Belén
Kucharski, F.
author2_role author
author
author
dc.subject.none.fl_str_mv Tropical Atlantic variability
Atlantic-Pacific connection
ENSO
Variabilidad del Atlántico Tropical
Conexión Atlántico-Pacífico
topic Tropical Atlantic variability
Atlantic-Pacific connection
ENSO
Variabilidad del Atlántico Tropical
Conexión Atlántico-Pacífico
description [EN] Previous studies have reported that the tropical Atlantic has had an influence on tropical Pacific interannual variability since the 1970s. This variability is studied in the present work, using simulations from a coupled model in the Indo-Pacific but with observed sea surface temperature (SST) prescribed over the Atlantic. The interannual variability is compared with that from a control simulation in which climatological SSTs are prescribed over the Atlantic. Differences in the Pacific mean state and in its variability are found in the forced simulation as a response to a warming in the equatorial Atlantic, characterized by a cooler background state and an increase in the variability over the tropical Pacific. A striking result is that the principal modes of tropical Pacific SST interannual variability show significant differences before and after the 1970s, providing new evidence of the Atlantic influence on the Pacific Ocean. Significant cooling (warming) in the equatorial Atlantic could have caused anomalous winds in the central-easter Pacific during the summer since 1970s. The thermocline depth also seems to be altered, triggering the dynamical processes involved in the development of El Niño (La Niña) phenomenon in the following winter. An increase in frequency of Niño and Niña events favouring the Central Pacific (CP) ones is observed in the last three decades. Further analyses using coupled models are still necessary to help us to understand the causes of this inter-basin connection.
publishDate 2012
dc.date.none.fl_str_mv 2012
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/64227
url http://hdl.handle.net/10261/64227
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3989/scimar.03610.19A
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv CSIC - Instituto de Ciencias del Mar (ICM)
publisher.none.fl_str_mv CSIC - Instituto de Ciencias del Mar (ICM)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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