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dc.contributor.author
Koenig, Zoé
dc.contributor.author
Provost, Christine
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dc.contributor.author
Park, Young Hyang
dc.contributor.author
Ferrari, Ramiro
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dc.contributor.author
Sennechael, Nathalie
dc.date.available
2017-06-08T20:16:00Z
dc.date.issued
2016-04
dc.identifier.citation
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
dc.identifier.issn
0148-0227
dc.identifier.uri
http://hdl.handle.net/11336/17820
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANTARCTIC CIRCUMPOLAR CURRENT
dc.subject
BAROCLINIC
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BAROTROPIC
dc.subject
BASIN MODES
dc.subject
DRAKE PASSAGE
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TRANSPORT
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-07T20:47:48Z
dc.identifier.eissn
2169-9291
dc.journal.volume
121
dc.journal.number
4
dc.journal.pagination
2572-2595
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Koenig, Zoé. Universite de Paris Vi; Francia
dc.description.fil
Fil: Provost, Christine. Universite de Paris Vi; Francia
dc.description.fil
Fil: Park, Young Hyang. Universite de Paris Vi; Francia
dc.description.fil
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
dc.description.fil
Fil: Sennechael, Nathalie. Universite de Paris Vi; Francia
dc.journal.title
Journal of Geophysical Research: Oceans
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/2015JC011436
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2015JC011436/abstract
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