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dc.contributor.author
Meinen, Christopher S.
dc.contributor.author
Garzoli, Silvia L.
dc.contributor.author
Perez, Renellys C.
dc.contributor.author
Campos, Edmo
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dc.contributor.author
Piola, Alberto Ricardo
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Chidichimo, María Paz
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dc.contributor.author
Dong, Shenfu
dc.contributor.author
Sato, Olga T.
dc.date.available
2019-03-29T21:10:25Z
dc.date.issued
2017-03
dc.identifier.citation
Meinen, Christopher S.; Garzoli, Silvia L.; Perez, Renellys C.; Campos, Edmo; Piola, Alberto Ricardo; et al.; Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014; Copernicus Publications; Ocean Science (os); 13; 1; 3-2017; 175-194
dc.identifier.issn
1812-0784
dc.identifier.uri
http://hdl.handle.net/11336/72884
dc.description.abstract
The Deep Western Boundary Current (DWBC) at 34.5° S in the South Atlantic carries a significant fraction of the cold deep limb of the Meridional Overturning Circulation (MOC), and therefore its variability affects the meridional heat transport and consequently the regional and global climate. Nearly 6 years of observations from a line of pressure-equipped inverted echo sounders (PIESs) have yielded an unprecedented data set for studying the characteristics of the time-varying DWBC volume transport at 34.5° S. Furthermore, the horizontal resolution of the observing array was greatly improved in December 2012 with the addition of two current-and-pressure-equipped inverted echo sounders (CPIESs) at the midpoints of the two westernmost pairs of PIES moorings. Regular hydrographic sections along the PIES/CPIES line confirm the presence of recently ventilated North Atlantic Deep Water carried by the DWBC. The time-mean absolute geostrophic transport integrated within the DWBC layer, defined between 800-4800 dbar and within longitude bounds of 51.5 to 44.5° W, is -15 Sv (1 Sv Combining double low line 106 m3 s-1; negative indicates southward flow). The observed peak-to-peak range in volume transport using these integration limits is from -89 to +50 Sv, and the temporal standard deviation is 23 Sv. Testing different vertical integration limits based on time-mean water-mass property levels yields small changes to these values, but no significant alteration to the character of the transport time series. The time-mean southward DWBC flow at this latitude is confined west of 49.5° W, with recirculations dominating the flow further offshore. As with other latitudes where the DWBC has been observed for multiple years, the time variability greatly exceeds the time mean, suggesting the presence of strong coherent vortices and/or Rossby Wave-like signals propagating to the boundary from the interior.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Copernicus Publications
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Deep Western Boundary Current
dc.subject
Variability
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South Atlantic
dc.subject
Observations
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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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
Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-03-29T12:08:54Z
dc.identifier.eissn
1812-0792
dc.journal.volume
13
dc.journal.number
1
dc.journal.pagination
175-194
dc.journal.pais
Alemania
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dc.journal.ciudad
Gottingen
dc.description.fil
Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
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Fil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
dc.description.fil
Fil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
dc.description.fil
Fil: Campos, Edmo. University of Miami; Estados Unidos. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval. Departamento Oceanografía; Argentina. Universidad de Buenos Aires; Argentina. Instituto Franco-Argentino sobre Estudios de Clima y sus Impactos; Argentina
dc.description.fil
Fil: Chidichimo, María Paz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval. Departamento Oceanografía; Argentina. Universidad de Buenos Aires; Argentina. Instituto Franco-Argentino sobre Estudios de Clima y sus Impactos; Argentina
dc.description.fil
Fil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
dc.description.fil
Fil: Sato, Olga T.. Universidade de Sao Paulo; Brasil
dc.journal.title
Ocean Science (os)
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.ocean-sci.net/13/175/2017/os-13-175-2017.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.5194/os-13-175-2017
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