Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S
- Autores
- Meinen, C. S.; Piola, Alberto Ricardo; Perez, R. C.; Garzoli, S. L.
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The first direct estimates of the temporal variability of the absolute transport in the Deep Western Boundary Current (DWBC) at 34.5° S in the South Atlantic Ocean are obtained using just under one year of data from a line of four pressure-equipped inverted echo sounders. Hydrographic sections collected in 2009 and 2010 confirm, based on neutral density, temperature, salinity, and oxygen values, the presence of the DWBC, one of the main deep pathways of the Meridional Overturning Circulation. Both data sets indicate that the DWBC reconstitutes itself after breaking into eddies in the western sub-tropical Atlantic near 8° S. The amplitude and spectral character of the DWBC transport variability are comparable with those observed in the North Atlantic, where longer records exist, with the DWBC at 34.5° S exhibiting a transport standard deviation of 25 Sv and variations of ∼ 40 Sv occurring within periods as short as a few days. There is little indication of an annual cycle in the DWBC transports, although the observational records are too short to be definitive. A Monte Carlo-style analysis using 27 yr of model output from the same location as the observations indicates that about 48-60 months of data will be required to fully assess the deep transport variability. The model suggests the presence of an annual cycle in DWBC transport, however its statistical significance with even 27 yr of model output is low, suggesting that seasonal variations in the model are weak.
Fil: Meinen, C. S.. No especifíca;
Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Perez, R. C.. No especifíca;
Fil: Garzoli, S. L.. No especifíca; - Materia
-
Deep Western Boundary Currents
Southwest Atlantic
Meridional Overturning Circulation - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/198339
Ver los metadatos del registro completo
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spelling |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° SMeinen, C. S.Piola, Alberto RicardoPerez, R. C.Garzoli, S. L.Deep Western Boundary CurrentsSouthwest AtlanticMeridional Overturning Circulationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The first direct estimates of the temporal variability of the absolute transport in the Deep Western Boundary Current (DWBC) at 34.5° S in the South Atlantic Ocean are obtained using just under one year of data from a line of four pressure-equipped inverted echo sounders. Hydrographic sections collected in 2009 and 2010 confirm, based on neutral density, temperature, salinity, and oxygen values, the presence of the DWBC, one of the main deep pathways of the Meridional Overturning Circulation. Both data sets indicate that the DWBC reconstitutes itself after breaking into eddies in the western sub-tropical Atlantic near 8° S. The amplitude and spectral character of the DWBC transport variability are comparable with those observed in the North Atlantic, where longer records exist, with the DWBC at 34.5° S exhibiting a transport standard deviation of 25 Sv and variations of ∼ 40 Sv occurring within periods as short as a few days. There is little indication of an annual cycle in the DWBC transports, although the observational records are too short to be definitive. A Monte Carlo-style analysis using 27 yr of model output from the same location as the observations indicates that about 48-60 months of data will be required to fully assess the deep transport variability. The model suggests the presence of an annual cycle in DWBC transport, however its statistical significance with even 27 yr of model output is low, suggesting that seasonal variations in the model are weak.Fil: Meinen, C. S.. No especifíca;Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Perez, R. C.. No especifíca;Fil: Garzoli, S. L.. No especifíca;Copernicus Publications2012-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/198339Meinen, C. S.; Piola, Alberto Ricardo; Perez, R. C.; Garzoli, S. L.; Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S; Copernicus Publications; Ocean Science (os); 8; 6; 11-2012; 1041-10541812-07841812-0792CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://os.copernicus.org/articles/8/1041/2012/info:eu-repo/semantics/altIdentifier/doi/10.5194/os-8-1041-2012info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:42:14Zoai:ri.conicet.gov.ar:11336/198339instacron: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:34982025-09-29 10:42:14.875CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
title |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
spellingShingle |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S Meinen, C. S. Deep Western Boundary Currents Southwest Atlantic Meridional Overturning Circulation |
title_short |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
title_full |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
title_fullStr |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
title_full_unstemmed |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
title_sort |
Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S |
dc.creator.none.fl_str_mv |
Meinen, C. S. Piola, Alberto Ricardo Perez, R. C. Garzoli, S. L. |
author |
Meinen, C. S. |
author_facet |
Meinen, C. S. Piola, Alberto Ricardo Perez, R. C. Garzoli, S. L. |
author_role |
author |
author2 |
Piola, Alberto Ricardo Perez, R. C. Garzoli, S. L. |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Deep Western Boundary Currents Southwest Atlantic Meridional Overturning Circulation |
topic |
Deep Western Boundary Currents Southwest Atlantic Meridional Overturning Circulation |
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 first direct estimates of the temporal variability of the absolute transport in the Deep Western Boundary Current (DWBC) at 34.5° S in the South Atlantic Ocean are obtained using just under one year of data from a line of four pressure-equipped inverted echo sounders. Hydrographic sections collected in 2009 and 2010 confirm, based on neutral density, temperature, salinity, and oxygen values, the presence of the DWBC, one of the main deep pathways of the Meridional Overturning Circulation. Both data sets indicate that the DWBC reconstitutes itself after breaking into eddies in the western sub-tropical Atlantic near 8° S. The amplitude and spectral character of the DWBC transport variability are comparable with those observed in the North Atlantic, where longer records exist, with the DWBC at 34.5° S exhibiting a transport standard deviation of 25 Sv and variations of ∼ 40 Sv occurring within periods as short as a few days. There is little indication of an annual cycle in the DWBC transports, although the observational records are too short to be definitive. A Monte Carlo-style analysis using 27 yr of model output from the same location as the observations indicates that about 48-60 months of data will be required to fully assess the deep transport variability. The model suggests the presence of an annual cycle in DWBC transport, however its statistical significance with even 27 yr of model output is low, suggesting that seasonal variations in the model are weak. Fil: Meinen, C. S.. No especifíca; Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Perez, R. C.. No especifíca; Fil: Garzoli, S. L.. No especifíca; |
description |
The first direct estimates of the temporal variability of the absolute transport in the Deep Western Boundary Current (DWBC) at 34.5° S in the South Atlantic Ocean are obtained using just under one year of data from a line of four pressure-equipped inverted echo sounders. Hydrographic sections collected in 2009 and 2010 confirm, based on neutral density, temperature, salinity, and oxygen values, the presence of the DWBC, one of the main deep pathways of the Meridional Overturning Circulation. Both data sets indicate that the DWBC reconstitutes itself after breaking into eddies in the western sub-tropical Atlantic near 8° S. The amplitude and spectral character of the DWBC transport variability are comparable with those observed in the North Atlantic, where longer records exist, with the DWBC at 34.5° S exhibiting a transport standard deviation of 25 Sv and variations of ∼ 40 Sv occurring within periods as short as a few days. There is little indication of an annual cycle in the DWBC transports, although the observational records are too short to be definitive. A Monte Carlo-style analysis using 27 yr of model output from the same location as the observations indicates that about 48-60 months of data will be required to fully assess the deep transport variability. The model suggests the presence of an annual cycle in DWBC transport, however its statistical significance with even 27 yr of model output is low, suggesting that seasonal variations in the model are weak. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-11 |
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/11336/198339 Meinen, C. S.; Piola, Alberto Ricardo; Perez, R. C.; Garzoli, S. L.; Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S; Copernicus Publications; Ocean Science (os); 8; 6; 11-2012; 1041-1054 1812-0784 1812-0792 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/198339 |
identifier_str_mv |
Meinen, C. S.; Piola, Alberto Ricardo; Perez, R. C.; Garzoli, S. L.; Deep Western Boundary Current transport variability in the South Atlantic: Preliminary results from a pilot array at 34.5° S; Copernicus Publications; Ocean Science (os); 8; 6; 11-2012; 1041-1054 1812-0784 1812-0792 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://os.copernicus.org/articles/8/1041/2012/ info:eu-repo/semantics/altIdentifier/doi/10.5194/os-8-1041-2012 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Copernicus Publications |
publisher.none.fl_str_mv |
Copernicus Publications |
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 |
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1844614454814179328 |
score |
13.070432 |