Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage

Autores
Koenig, Zoé; Provost, Christine; Park, Young Hyang; Ferrari, Ramiro; Sennechael, Nathalie
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The 20 year (October 1992 to August 2013) observation-based volume transport time series of the Antarctic Circumpolar Current (ACC) through Drake Passage (DP) across the Jason altimeter track #104 is analyzed to better understand the ACC transport variability and its potential causes. The time series of three transport components (total (TT), barotropic (BT), and baroclinic (BC)) referenced to 3000 m present energetic intraseasonal fluctuations, with a salient spectral peak at 50 and 36 days, with the largest (least) variance being associated with the BT (BC) component. Low-frequency variations are much less energetic with a significant variance limited to the annual and biannual timescales and show a nonstationary intermittent link with the Southern Annular Mode and the Nino 3.4 index for interannual timescales. The region around 57°S in the Yaghan Basin appears to be a strategic point for a practical monitoring of the ACC transport, as the whole-track TT is significantly correlated with the local TT (r = 0.53) and BT (r = 0.69) around 57°S. These local BT (and TT) variations are associated with a well-defined tripole pattern in altimetric sea level anomaly (SLA). There is evidence that the tripole pattern associated with BT is locally generated when the BC-associated mesoscale SLAs, which have propagated eastward from an upstream area of DP, cross the Shackleton Fracture Zone to penetrate into the Yaghan Basin. Barotropic basin modes excited within the Yaghan Basin are discussed as a plausible mechanism for the observed energy-containing intraseasonal spectral peaks found in the transport variability.
Fil: Koenig, Zoé. Universite de Paris Vi; Francia
Fil: Provost, Christine. Universite de Paris Vi; Francia
Fil: Park, Young Hyang. Universite de Paris Vi; Francia
Fil: Ferrari, Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmosfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmosfera; Argentina
Fil: Sennechael, Nathalie. Universite de Paris Vi; Francia
Materia
ANTARCTIC CIRCUMPOLAR CURRENT
BAROCLINIC
BAROTROPIC
BASIN MODES
DRAKE PASSAGE
TRANSPORT
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/17820
Acceder
id CONICETDig_7f4248feb8443fde0963d7ce5e509fc0
oai_identifier_str oai:ri.conicet.gov.ar:11336/17820
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Anatomy of the Antarctic Circumpolar Current volume transports through Drake PassageKoenig, ZoéProvost, ChristinePark, Young HyangFerrari, RamiroSennechael, NathalieANTARCTIC CIRCUMPOLAR CURRENTBAROCLINICBAROTROPICBASIN MODESDRAKE PASSAGETRANSPORThttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The 20 year (October 1992 to August 2013) observation-based volume transport time series of the Antarctic Circumpolar Current (ACC) through Drake Passage (DP) across the Jason altimeter track #104 is analyzed to better understand the ACC transport variability and its potential causes. The time series of three transport components (total (TT), barotropic (BT), and baroclinic (BC)) referenced to 3000 m present energetic intraseasonal fluctuations, with a salient spectral peak at 50 and 36 days, with the largest (least) variance being associated with the BT (BC) component. Low-frequency variations are much less energetic with a significant variance limited to the annual and biannual timescales and show a nonstationary intermittent link with the Southern Annular Mode and the Nino 3.4 index for interannual timescales. The region around 57°S in the Yaghan Basin appears to be a strategic point for a practical monitoring of the ACC transport, as the whole-track TT is significantly correlated with the local TT (r = 0.53) and BT (r = 0.69) around 57°S. These local BT (and TT) variations are associated with a well-defined tripole pattern in altimetric sea level anomaly (SLA). There is evidence that the tripole pattern associated with BT is locally generated when the BC-associated mesoscale SLAs, which have propagated eastward from an upstream area of DP, cross the Shackleton Fracture Zone to penetrate into the Yaghan Basin. Barotropic basin modes excited within the Yaghan Basin are discussed as a plausible mechanism for the observed energy-containing intraseasonal spectral peaks found in the transport variability.Fil: Koenig, Zoé. Universite de Paris Vi; FranciaFil: Provost, Christine. Universite de Paris Vi; FranciaFil: Park, Young Hyang. Universite de Paris Vi; FranciaFil: Ferrari, Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmosfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmosfera; ArgentinaFil: Sennechael, Nathalie. Universite de Paris Vi; FranciaAmerican Geophysical Union2016-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17820Koenig, Zoé; Provost, Christine; Park, Young Hyang; Ferrari, Ramiro; Sennechael, Nathalie; Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage; American Geophysical Union; Journal of Geophysical Research: Oceans; 121; 4; 4-2016; 2572-25950148-02272169-9291enginfo:eu-repo/semantics/altIdentifier/doi/10.1002/2015JC011436info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2015JC011436/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:49:21Zoai:ri.conicet.gov.ar:11336/17820instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:49:21.395CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
title Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
spellingShingle Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
Koenig, Zoé
ANTARCTIC CIRCUMPOLAR CURRENT
BAROCLINIC
BAROTROPIC
BASIN MODES
DRAKE PASSAGE
TRANSPORT
title_short Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
title_full Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
title_fullStr Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
title_full_unstemmed Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
title_sort Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
dc.creator.none.fl_str_mv Koenig, Zoé
Provost, Christine
Park, Young Hyang
Ferrari, Ramiro
Sennechael, Nathalie
author Koenig, Zoé
author_facet Koenig, Zoé
Provost, Christine
Park, Young Hyang
Ferrari, Ramiro
Sennechael, Nathalie
author_role author
author2 Provost, Christine
Park, Young Hyang
Ferrari, Ramiro
Sennechael, Nathalie
author2_role author
author
author
author
dc.subject.none.fl_str_mv ANTARCTIC CIRCUMPOLAR CURRENT
BAROCLINIC
BAROTROPIC
BASIN MODES
DRAKE PASSAGE
TRANSPORT
topic ANTARCTIC CIRCUMPOLAR CURRENT
BAROCLINIC
BAROTROPIC
BASIN MODES
DRAKE PASSAGE
TRANSPORT
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The 20 year (October 1992 to August 2013) observation-based volume transport time series of the Antarctic Circumpolar Current (ACC) through Drake Passage (DP) across the Jason altimeter track #104 is analyzed to better understand the ACC transport variability and its potential causes. The time series of three transport components (total (TT), barotropic (BT), and baroclinic (BC)) referenced to 3000 m present energetic intraseasonal fluctuations, with a salient spectral peak at 50 and 36 days, with the largest (least) variance being associated with the BT (BC) component. Low-frequency variations are much less energetic with a significant variance limited to the annual and biannual timescales and show a nonstationary intermittent link with the Southern Annular Mode and the Nino 3.4 index for interannual timescales. The region around 57°S in the Yaghan Basin appears to be a strategic point for a practical monitoring of the ACC transport, as the whole-track TT is significantly correlated with the local TT (r = 0.53) and BT (r = 0.69) around 57°S. These local BT (and TT) variations are associated with a well-defined tripole pattern in altimetric sea level anomaly (SLA). There is evidence that the tripole pattern associated with BT is locally generated when the BC-associated mesoscale SLAs, which have propagated eastward from an upstream area of DP, cross the Shackleton Fracture Zone to penetrate into the Yaghan Basin. Barotropic basin modes excited within the Yaghan Basin are discussed as a plausible mechanism for the observed energy-containing intraseasonal spectral peaks found in the transport variability.
Fil: Koenig, Zoé. Universite de Paris Vi; Francia
Fil: Provost, Christine. Universite de Paris Vi; Francia
Fil: Park, Young Hyang. Universite de Paris Vi; Francia
Fil: Ferrari, Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmosfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmosfera; Argentina
Fil: Sennechael, Nathalie. Universite de Paris Vi; Francia
description The 20 year (October 1992 to August 2013) observation-based volume transport time series of the Antarctic Circumpolar Current (ACC) through Drake Passage (DP) across the Jason altimeter track #104 is analyzed to better understand the ACC transport variability and its potential causes. The time series of three transport components (total (TT), barotropic (BT), and baroclinic (BC)) referenced to 3000 m present energetic intraseasonal fluctuations, with a salient spectral peak at 50 and 36 days, with the largest (least) variance being associated with the BT (BC) component. Low-frequency variations are much less energetic with a significant variance limited to the annual and biannual timescales and show a nonstationary intermittent link with the Southern Annular Mode and the Nino 3.4 index for interannual timescales. The region around 57°S in the Yaghan Basin appears to be a strategic point for a practical monitoring of the ACC transport, as the whole-track TT is significantly correlated with the local TT (r = 0.53) and BT (r = 0.69) around 57°S. These local BT (and TT) variations are associated with a well-defined tripole pattern in altimetric sea level anomaly (SLA). There is evidence that the tripole pattern associated with BT is locally generated when the BC-associated mesoscale SLAs, which have propagated eastward from an upstream area of DP, cross the Shackleton Fracture Zone to penetrate into the Yaghan Basin. Barotropic basin modes excited within the Yaghan Basin are discussed as a plausible mechanism for the observed energy-containing intraseasonal spectral peaks found in the transport variability.
publishDate 2016
dc.date.none.fl_str_mv 2016-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/17820
Koenig, Zoé; Provost, Christine; Park, Young Hyang; Ferrari, Ramiro; Sennechael, Nathalie; Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage; American Geophysical Union; Journal of Geophysical Research: Oceans; 121; 4; 4-2016; 2572-2595
0148-0227
2169-9291
url http://hdl.handle.net/11336/17820
identifier_str_mv Koenig, Zoé; Provost, Christine; Park, Young Hyang; Ferrari, Ramiro; Sennechael, Nathalie; Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage; American Geophysical Union; Journal of Geophysical Research: Oceans; 121; 4; 4-2016; 2572-2595
0148-0227
2169-9291
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/2015JC011436
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2015JC011436/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842268968869429248
score 13.13397

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