Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic
- Autores
- Meinen, Christopher S.; Speich, Sabrina; Perez, Renellys C.; Dong, Shenfu; Piola, Alberto Ricardo; Garzoli, Silvia L.; Baringer, Molly O.; Gladyshev, Sergey; Campos, Edmo
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Data from two boundary arrays deployed along 34.5°S are combined to produce the first continuous in situ time series observations of the basin-wide meridional overturning circulation (MOC) in the South Atlantic. Daily estimates of the MOC between March 2009 and December 2010 range between 3 Sv and 39 Sv (1 Sv = 106 m3 s-1) after a 10 day low-pass filter is applied. Much of the variability in this ∼20 month record occurs at periods shorter than 100 days. Approximately two-thirds of the MOC variability is due to changes in the geostrophic (baroclinic plus barotropic) volume transport, with the remainder associated with the direct wind-forced Ekman transport. When low-pass filtered to match previously published analyses in the North Atlantic, the observed temporal standard deviation at 34.5°S matches or somewhat exceeds that observed by time series observations at 16°N, 26.5°N, and 41°N. For periods shorter than 20 days the basin-wide MOC variations are most strongly influenced by Ekman flows, while at periods between 20 and 90 days the geostrophic flows tend to exert slightly more control over the total transport variability of the MOC. The geostrophic shear variations are roughly equally controlled by density variations on the western and eastern boundaries at all time scales captured in the record. The observed time-mean MOC vertical structure and temporal variability agree well with the limited independent observations available for confirmation. Key Points The MOC at 34.5S is highly variable, with a range of 30+ Sv during ~20 months MOC variations at 34.5S occur at periods ranging from a few days to a few months MOC estimates from the PIES moorings agree well with existing validation data
Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Speich, Sabrina. University of Brest; Francia
Fil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Franco-Argentino Sobre Estudios del Clima y sus Impactos; Argentina. Universidad de Buenos Aires; Argentina
Fil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos
Fil: Baringer, Molly O.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Gladyshev, Sergey. Shirshov Institute of Oceanology; Rusia
Fil: Campos, Edmo. Universidade de Sao Paulo; Brasil - Materia
-
BOTTOM PRESSURE
INVERTED ECHO SOUNDER
MERIDIONAL OVERTURNING CIRCULATION
SOUTH ATLANTIC
TRANSPORT - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/89338
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/89338 |
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repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South AtlanticMeinen, Christopher S.Speich, SabrinaPerez, Renellys C.Dong, ShenfuPiola, Alberto RicardoGarzoli, Silvia L.Baringer, Molly O.Gladyshev, SergeyCampos, EdmoBOTTOM PRESSUREINVERTED ECHO SOUNDERMERIDIONAL OVERTURNING CIRCULATIONSOUTH ATLANTICTRANSPORThttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Data from two boundary arrays deployed along 34.5°S are combined to produce the first continuous in situ time series observations of the basin-wide meridional overturning circulation (MOC) in the South Atlantic. Daily estimates of the MOC between March 2009 and December 2010 range between 3 Sv and 39 Sv (1 Sv = 106 m3 s-1) after a 10 day low-pass filter is applied. Much of the variability in this ∼20 month record occurs at periods shorter than 100 days. Approximately two-thirds of the MOC variability is due to changes in the geostrophic (baroclinic plus barotropic) volume transport, with the remainder associated with the direct wind-forced Ekman transport. When low-pass filtered to match previously published analyses in the North Atlantic, the observed temporal standard deviation at 34.5°S matches or somewhat exceeds that observed by time series observations at 16°N, 26.5°N, and 41°N. For periods shorter than 20 days the basin-wide MOC variations are most strongly influenced by Ekman flows, while at periods between 20 and 90 days the geostrophic flows tend to exert slightly more control over the total transport variability of the MOC. The geostrophic shear variations are roughly equally controlled by density variations on the western and eastern boundaries at all time scales captured in the record. The observed time-mean MOC vertical structure and temporal variability agree well with the limited independent observations available for confirmation. Key Points The MOC at 34.5S is highly variable, with a range of 30+ Sv during ~20 months MOC variations at 34.5S occur at periods ranging from a few days to a few months MOC estimates from the PIES moorings agree well with existing validation dataFil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Speich, Sabrina. University of Brest; FranciaFil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados UnidosFil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados UnidosFil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Franco-Argentino Sobre Estudios del Clima y sus Impactos; Argentina. Universidad de Buenos Aires; ArgentinaFil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados UnidosFil: Baringer, Molly O.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Gladyshev, Sergey. Shirshov Institute of Oceanology; RusiaFil: Campos, Edmo. Universidade de Sao Paulo; BrasilAmerican Geophysical Union2013-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/89338Meinen, Christopher S.; Speich, Sabrina; Perez, Renellys C.; Dong, Shenfu; Piola, Alberto Ricardo; et al.; Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic; American Geophysical Union; Journal of Geophysical Research; 118; 12; 12-2013; 6461-64780148-02272169-9291CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JC009228info:eu-repo/semantics/altIdentifier/doi/10.1002/2013JC009228info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:59:06Zoai:ri.conicet.gov.ar:11336/89338instacron: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 09:59:06.946CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
title |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
spellingShingle |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic Meinen, Christopher S. BOTTOM PRESSURE INVERTED ECHO SOUNDER MERIDIONAL OVERTURNING CIRCULATION SOUTH ATLANTIC TRANSPORT |
title_short |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
title_full |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
title_fullStr |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
title_full_unstemmed |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
title_sort |
Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic |
dc.creator.none.fl_str_mv |
Meinen, Christopher S. Speich, Sabrina Perez, Renellys C. Dong, Shenfu Piola, Alberto Ricardo Garzoli, Silvia L. Baringer, Molly O. Gladyshev, Sergey Campos, Edmo |
author |
Meinen, Christopher S. |
author_facet |
Meinen, Christopher S. Speich, Sabrina Perez, Renellys C. Dong, Shenfu Piola, Alberto Ricardo Garzoli, Silvia L. Baringer, Molly O. Gladyshev, Sergey Campos, Edmo |
author_role |
author |
author2 |
Speich, Sabrina Perez, Renellys C. Dong, Shenfu Piola, Alberto Ricardo Garzoli, Silvia L. Baringer, Molly O. Gladyshev, Sergey Campos, Edmo |
author2_role |
author author author author author author author author |
dc.subject.none.fl_str_mv |
BOTTOM PRESSURE INVERTED ECHO SOUNDER MERIDIONAL OVERTURNING CIRCULATION SOUTH ATLANTIC TRANSPORT |
topic |
BOTTOM PRESSURE INVERTED ECHO SOUNDER MERIDIONAL OVERTURNING CIRCULATION SOUTH ATLANTIC 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 |
Data from two boundary arrays deployed along 34.5°S are combined to produce the first continuous in situ time series observations of the basin-wide meridional overturning circulation (MOC) in the South Atlantic. Daily estimates of the MOC between March 2009 and December 2010 range between 3 Sv and 39 Sv (1 Sv = 106 m3 s-1) after a 10 day low-pass filter is applied. Much of the variability in this ∼20 month record occurs at periods shorter than 100 days. Approximately two-thirds of the MOC variability is due to changes in the geostrophic (baroclinic plus barotropic) volume transport, with the remainder associated with the direct wind-forced Ekman transport. When low-pass filtered to match previously published analyses in the North Atlantic, the observed temporal standard deviation at 34.5°S matches or somewhat exceeds that observed by time series observations at 16°N, 26.5°N, and 41°N. For periods shorter than 20 days the basin-wide MOC variations are most strongly influenced by Ekman flows, while at periods between 20 and 90 days the geostrophic flows tend to exert slightly more control over the total transport variability of the MOC. The geostrophic shear variations are roughly equally controlled by density variations on the western and eastern boundaries at all time scales captured in the record. The observed time-mean MOC vertical structure and temporal variability agree well with the limited independent observations available for confirmation. Key Points The MOC at 34.5S is highly variable, with a range of 30+ Sv during ~20 months MOC variations at 34.5S occur at periods ranging from a few days to a few months MOC estimates from the PIES moorings agree well with existing validation data Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos Fil: Speich, Sabrina. University of Brest; Francia Fil: Perez, Renellys C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos Fil: Dong, Shenfu. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Franco-Argentino Sobre Estudios del Clima y sus Impactos; Argentina. Universidad de Buenos Aires; Argentina Fil: Garzoli, Silvia L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos. University of Miami; Estados Unidos Fil: Baringer, Molly O.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos Fil: Gladyshev, Sergey. Shirshov Institute of Oceanology; Rusia Fil: Campos, Edmo. Universidade de Sao Paulo; Brasil |
description |
Data from two boundary arrays deployed along 34.5°S are combined to produce the first continuous in situ time series observations of the basin-wide meridional overturning circulation (MOC) in the South Atlantic. Daily estimates of the MOC between March 2009 and December 2010 range between 3 Sv and 39 Sv (1 Sv = 106 m3 s-1) after a 10 day low-pass filter is applied. Much of the variability in this ∼20 month record occurs at periods shorter than 100 days. Approximately two-thirds of the MOC variability is due to changes in the geostrophic (baroclinic plus barotropic) volume transport, with the remainder associated with the direct wind-forced Ekman transport. When low-pass filtered to match previously published analyses in the North Atlantic, the observed temporal standard deviation at 34.5°S matches or somewhat exceeds that observed by time series observations at 16°N, 26.5°N, and 41°N. For periods shorter than 20 days the basin-wide MOC variations are most strongly influenced by Ekman flows, while at periods between 20 and 90 days the geostrophic flows tend to exert slightly more control over the total transport variability of the MOC. The geostrophic shear variations are roughly equally controlled by density variations on the western and eastern boundaries at all time scales captured in the record. The observed time-mean MOC vertical structure and temporal variability agree well with the limited independent observations available for confirmation. Key Points The MOC at 34.5S is highly variable, with a range of 30+ Sv during ~20 months MOC variations at 34.5S occur at periods ranging from a few days to a few months MOC estimates from the PIES moorings agree well with existing validation data |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-12 |
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/11336/89338 Meinen, Christopher S.; Speich, Sabrina; Perez, Renellys C.; Dong, Shenfu; Piola, Alberto Ricardo; et al.; Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic; American Geophysical Union; Journal of Geophysical Research; 118; 12; 12-2013; 6461-6478 0148-0227 2169-9291 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/89338 |
identifier_str_mv |
Meinen, Christopher S.; Speich, Sabrina; Perez, Renellys C.; Dong, Shenfu; Piola, Alberto Ricardo; et al.; Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic; American Geophysical Union; Journal of Geophysical Research; 118; 12; 12-2013; 6461-6478 0148-0227 2169-9291 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://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JC009228 info:eu-repo/semantics/altIdentifier/doi/10.1002/2013JC009228 |
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 |
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1844613756406988800 |
score |
13.070432 |