Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014

Autores
Meinen, Christopher S.; Garzoli, Silvia L.; Perez, Renellys C.; Campos, Edmo; Piola, Alberto Ricardo; Chidichimo, María Paz; Dong, Shenfu; Sato, Olga T.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Campos, Edmo. University of Miami; Estados Unidos. Universidade de Sao Paulo; Brasil
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
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
Fil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Sato, Olga T.. Universidade de Sao Paulo; Brasil
Materia
DEEP WESTERN BOUNDARY CURRENT
VARIABILITY
SOUTH ATLANTIC
OBSERVATIONS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72884

id CONICETDig_cec503de26fda09667196c05884c413a
oai_identifier_str oai:ri.conicet.gov.ar:11336/72884
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014Meinen, Christopher S.Garzoli, Silvia L.Perez, Renellys C.Campos, EdmoPiola, Alberto RicardoChidichimo, María PazDong, ShenfuSato, Olga T.DEEP WESTERN BOUNDARY CURRENTVARIABILITYSOUTH ATLANTICOBSERVATIONShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The 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.Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados UnidosFil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados UnidosFil: Campos, Edmo. University of Miami; Estados Unidos. Universidade de Sao Paulo; BrasilFil: 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; ArgentinaFil: 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; ArgentinaFil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Sato, Olga T.. Universidade de Sao Paulo; BrasilCopernicus Publications2017-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72884Meinen, 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; 175-1941812-07841812-0792CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.ocean-sci.net/13/175/2017/os-13-175-2017.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.5194/os-13-175-2017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:32:27Zoai:ri.conicet.gov.ar:11336/72884instacron: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 09:32:27.45CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
title Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
spellingShingle Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
Meinen, Christopher S.
DEEP WESTERN BOUNDARY CURRENT
VARIABILITY
SOUTH ATLANTIC
OBSERVATIONS
title_short Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
title_full Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
title_fullStr Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
title_full_unstemmed Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
title_sort Characteristics and causes of Deep Western Boundary Current transport variability at 34.5° S during 2009-2014
dc.creator.none.fl_str_mv Meinen, Christopher S.
Garzoli, Silvia L.
Perez, Renellys C.
Campos, Edmo
Piola, Alberto Ricardo
Chidichimo, María Paz
Dong, Shenfu
Sato, Olga T.
author Meinen, Christopher S.
author_facet Meinen, Christopher S.
Garzoli, Silvia L.
Perez, Renellys C.
Campos, Edmo
Piola, Alberto Ricardo
Chidichimo, María Paz
Dong, Shenfu
Sato, Olga T.
author_role author
author2 Garzoli, Silvia L.
Perez, Renellys C.
Campos, Edmo
Piola, Alberto Ricardo
Chidichimo, María Paz
Dong, Shenfu
Sato, Olga T.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv DEEP WESTERN BOUNDARY CURRENT
VARIABILITY
SOUTH ATLANTIC
OBSERVATIONS
topic DEEP WESTERN BOUNDARY CURRENT
VARIABILITY
SOUTH ATLANTIC
OBSERVATIONS
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 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.
Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Campos, Edmo. University of Miami; Estados Unidos. Universidade de Sao Paulo; Brasil
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
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
Fil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Sato, Olga T.. Universidade de Sao Paulo; Brasil
description 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.
publishDate 2017
dc.date.none.fl_str_mv 2017-03
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/11336/72884
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
1812-0784
1812-0792
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72884
identifier_str_mv 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
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://www.ocean-sci.net/13/175/2017/os-13-175-2017.html
info:eu-repo/semantics/altIdentifier/doi/10.5194/os-13-175-2017
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
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
_version_ 1844612990064656384
score 13.070432