Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea

The Kuroshio is known to intrude onto the continental shelf in the southern East China Sea (ECS) northeast of Taiwan. Two types of intrusions are observed: large and small, depending on how far the Kuroshio penetrates onto the ECS continental shelf, and on the location where it crosses the shelf bre...

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Detalles Bibliográficos
Autores: Vélez-Belchí, Pedro, Centurioni, L.R., Lee, D.K., Jan, S., Niiler, P.P.
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/317875
Acceso en línea:http://hdl.handle.net/10261/317875
Access Level:acceso abierto
Palabra clave:Medio Marino
Centro Oceanográfico de Canarias
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spelling Eddy induced Kuroshio intrusions onto the continental shelf of the East China SeaVélez-Belchí, PedroCenturioni, L.R.Lee, D.K.Jan, S.Niiler, P.P.Medio MarinoCentro Oceanográfico de CanariasThe Kuroshio is known to intrude onto the continental shelf in the southern East China Sea (ECS) northeast of Taiwan. Two types of intrusions are observed: large and small, depending on how far the Kuroshio penetrates onto the ECS continental shelf, and on the location where it crosses the shelf break. This study demonstrates that cyclonic eddies from the western Pacific induce some of these large Kuroshio intrusions. The large intrusions are identified from more than 20 years of drifter tracks archived in the Global Drifter Program historical database and from weekly and biweekly drifter deployments carried out between April 2008 and September 2009 west of the Green Island (Taiwan). Kuroshio intrusions are observed in all seasons. Cyclonic mesoscale eddies, generated in the Subtropical Countercurrent and North Equatorial Current regions of the northwest Pacific Ocean, propagate westward into the Kuroshio and are well correlated with the observed intrusions. During the intrusions, the mean sea level anomaly computed from AVISO gridded maps shows a welldefined cyclonic circulation southeast of the I-Lan ridge. The mean sea level anomaly also shows the meandering pattern of the Kuroshio when it intrudes onto the continental shelf of the southern East China Sea. The high correlation between the Kuroshio volume transport in the East Taiwan Channel (observed with moorings) and the satellite sea level anomaly permits us to use sea level anomaly as a proxy for the Kuroshio volume transport. When direct transport measurements are not available, this proxy is used to verify that intrusions due to the westward propagating eddies occur when the Kuroshio transport is low. An analytical reduced gravity model of an incident baroclinic current upon a step shelf is used to explain the difference between the large and small intrusions.Sí202320232013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/317875reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Canariasinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3178752026-05-22T06:33:51Z
dc.title.none.fl_str_mv Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
title Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
spellingShingle Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
Vélez-Belchí, Pedro
Medio Marino
Centro Oceanográfico de Canarias
title_short Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
title_full Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
title_fullStr Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
title_full_unstemmed Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
title_sort Eddy induced Kuroshio intrusions onto the continental shelf of the East China Sea
dc.creator.none.fl_str_mv Vélez-Belchí, Pedro
Centurioni, L.R.
Lee, D.K.
Jan, S.
Niiler, P.P.
author Vélez-Belchí, Pedro
author_facet Vélez-Belchí, Pedro
Centurioni, L.R.
Lee, D.K.
Jan, S.
Niiler, P.P.
author_role author
author2 Centurioni, L.R.
Lee, D.K.
Jan, S.
Niiler, P.P.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Medio Marino
Centro Oceanográfico de Canarias
topic Medio Marino
Centro Oceanográfico de Canarias
description The Kuroshio is known to intrude onto the continental shelf in the southern East China Sea (ECS) northeast of Taiwan. Two types of intrusions are observed: large and small, depending on how far the Kuroshio penetrates onto the ECS continental shelf, and on the location where it crosses the shelf break. This study demonstrates that cyclonic eddies from the western Pacific induce some of these large Kuroshio intrusions. The large intrusions are identified from more than 20 years of drifter tracks archived in the Global Drifter Program historical database and from weekly and biweekly drifter deployments carried out between April 2008 and September 2009 west of the Green Island (Taiwan). Kuroshio intrusions are observed in all seasons. Cyclonic mesoscale eddies, generated in the Subtropical Countercurrent and North Equatorial Current regions of the northwest Pacific Ocean, propagate westward into the Kuroshio and are well correlated with the observed intrusions. During the intrusions, the mean sea level anomaly computed from AVISO gridded maps shows a welldefined cyclonic circulation southeast of the I-Lan ridge. The mean sea level anomaly also shows the meandering pattern of the Kuroshio when it intrudes onto the continental shelf of the southern East China Sea. The high correlation between the Kuroshio volume transport in the East Taiwan Channel (observed with moorings) and the satellite sea level anomaly permits us to use sea level anomaly as a proxy for the Kuroshio volume transport. When direct transport measurements are not available, this proxy is used to verify that intrusions due to the westward propagating eddies occur when the Kuroshio transport is low. An analytical reduced gravity model of an incident baroclinic current upon a step shelf is used to explain the difference between the large and small intrusions.
publishDate 2013
dc.date.none.fl_str_mv 2013
2023
2023
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/10261/317875
url http://hdl.handle.net/10261/317875
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Canarias
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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 15.811543

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