Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S

Autores
Kersalé, M.; Meinen, Christopher S.; Perez, R. C.; Piola, Alberto Ricardo; Speich, S.; Campos, E. J. D.; Garzoli, S. L.; Ansorge, I.; Volkov, D. L.; Le Hénaff, M.; Dong, S.; Lamont, T.; Sato, O. T.; van den Berg, M.
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Variations in the mass and heat transported by the meridional overturning circulation (MOC) have important, well-documented, influences on global and regional climate, weather, ecosystems, and coastal sea levels. However, continuous, high-frequency, observations of these quantities have been limited to date. Multiple years of full-depth daily observations from moored instruments in the South Atlantic at 34.5°S are combined with satellite observations to resolve the volume transports in both the upper and abyssal MOC cells, and the associated full-depth meridional heat transport (MHT), on daily to interannual timescales. A newly developed method for combining satellite sea level observations with historical hydrographic measurements was used to estimate daily full-depth ocean profiles of temperature in the ocean interior where mooring coverage is sparse. The average MHT during 2013–2017 is 0.5 PW, with a daily standard deviation of 0.8 PW. The MHT variability is most strongly driven by the geostrophic relative velocity contributions (horizontal density-gradient changes). This variability is highly correlated with the volume transport variability of the MOC upper cell (r = 0.96) and modestly anti-correlated (r = −0.52) with the abyssal cell variations. An empirical relationship between the MHT and MOC values was developed allowing the reconstruction of a longer MHT time series including the pilot array period (2009–2010). Seasonal variation of the MHT is significant, and results from strong variations of all terms (Ekman, barotropic, and baroclinic). Although the 2013–2017 shows an increasing MHT trend (0.14 PW/year), the longer time period record suggests that the apparent trend may simply be interannual modulation of MHT at 34.5°S.
Fil: Kersalé, M.. Miami University; Estados Unidos
Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Perez, R. C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Speich, S.. Centre National de la Recherche Scientifique. Ecole Normale Supérieure; Francia
Fil: Campos, E. J. D.. Universidade de Sao Paulo; Brasil
Fil: Garzoli, S. L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Ansorge, I.. University of Cape Town; Sudáfrica
Fil: Volkov, D. L.. University of Miami; Estados Unidos
Fil: Le Hénaff, M.. University of Miami; Estados Unidos
Fil: Dong, S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Lamont, T.. University of Cape Town; Sudáfrica
Fil: Sato, O. T.. Universidade de Sao Paulo; Brasil
Fil: van den Berg, M.. University of Cape Town; Sudáfrica
Materia
Meridional Overturning Circulation
Meridional Heat Flux
SAMOC
South Atlantic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/165201

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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°SKersalé, M.Meinen, Christopher S.Perez, R. C.Piola, Alberto RicardoSpeich, S.Campos, E. J. D.Garzoli, S. L.Ansorge, I.Volkov, D. L.Le Hénaff, M.Dong, S.Lamont, T.Sato, O. T.van den Berg, M.Meridional Overturning CirculationMeridional Heat FluxSAMOCSouth Atlantichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Variations in the mass and heat transported by the meridional overturning circulation (MOC) have important, well-documented, influences on global and regional climate, weather, ecosystems, and coastal sea levels. However, continuous, high-frequency, observations of these quantities have been limited to date. Multiple years of full-depth daily observations from moored instruments in the South Atlantic at 34.5°S are combined with satellite observations to resolve the volume transports in both the upper and abyssal MOC cells, and the associated full-depth meridional heat transport (MHT), on daily to interannual timescales. A newly developed method for combining satellite sea level observations with historical hydrographic measurements was used to estimate daily full-depth ocean profiles of temperature in the ocean interior where mooring coverage is sparse. The average MHT during 2013–2017 is 0.5 PW, with a daily standard deviation of 0.8 PW. The MHT variability is most strongly driven by the geostrophic relative velocity contributions (horizontal density-gradient changes). This variability is highly correlated with the volume transport variability of the MOC upper cell (r = 0.96) and modestly anti-correlated (r = −0.52) with the abyssal cell variations. An empirical relationship between the MHT and MOC values was developed allowing the reconstruction of a longer MHT time series including the pilot array period (2009–2010). Seasonal variation of the MHT is significant, and results from strong variations of all terms (Ekman, barotropic, and baroclinic). Although the 2013–2017 shows an increasing MHT trend (0.14 PW/year), the longer time period record suggests that the apparent trend may simply be interannual modulation of MHT at 34.5°S.Fil: Kersalé, M.. Miami University; Estados UnidosFil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Perez, R. C.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Speich, S.. Centre National de la Recherche Scientifique. Ecole Normale Supérieure; FranciaFil: Campos, E. J. D.. Universidade de Sao Paulo; BrasilFil: Garzoli, S. L.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Ansorge, I.. University of Cape Town; SudáfricaFil: Volkov, D. L.. University of Miami; Estados UnidosFil: Le Hénaff, M.. University of Miami; Estados UnidosFil: Dong, S.. Atlantic Oceanographic and Meteorological Laboratory; Estados UnidosFil: Lamont, T.. University of Cape Town; SudáfricaFil: Sato, O. T.. Universidade de Sao Paulo; BrasilFil: van den Berg, M.. University of Cape Town; SudáfricaBlackwell Publishing2021-04info: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/11336/165201Kersalé, M.; Meinen, Christopher S.; Perez, R. C.; Piola, Alberto Ricardo; Speich, S.; et al.; Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S; Blackwell Publishing; Journal of Geophysical Research: Oceans; 126; 5; 4-2021; 1-232169-92752169-9291CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1029/2020JC016947info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JC016947info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:33:58Zoai:ri.conicet.gov.ar:11336/165201instacron: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 10:33:58.996CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
title Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
spellingShingle Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
Kersalé, M.
Meridional Overturning Circulation
Meridional Heat Flux
SAMOC
South Atlantic
title_short Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
title_full Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
title_fullStr Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
title_full_unstemmed Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
title_sort Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
dc.creator.none.fl_str_mv Kersalé, M.
Meinen, Christopher S.
Perez, R. C.
Piola, Alberto Ricardo
Speich, S.
Campos, E. J. D.
Garzoli, S. L.
Ansorge, I.
Volkov, D. L.
Le Hénaff, M.
Dong, S.
Lamont, T.
Sato, O. T.
van den Berg, M.
author Kersalé, M.
author_facet Kersalé, M.
Meinen, Christopher S.
Perez, R. C.
Piola, Alberto Ricardo
Speich, S.
Campos, E. J. D.
Garzoli, S. L.
Ansorge, I.
Volkov, D. L.
Le Hénaff, M.
Dong, S.
Lamont, T.
Sato, O. T.
van den Berg, M.
author_role author
author2 Meinen, Christopher S.
Perez, R. C.
Piola, Alberto Ricardo
Speich, S.
Campos, E. J. D.
Garzoli, S. L.
Ansorge, I.
Volkov, D. L.
Le Hénaff, M.
Dong, S.
Lamont, T.
Sato, O. T.
van den Berg, M.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Meridional Overturning Circulation
Meridional Heat Flux
SAMOC
South Atlantic
topic Meridional Overturning Circulation
Meridional Heat Flux
SAMOC
South Atlantic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Variations in the mass and heat transported by the meridional overturning circulation (MOC) have important, well-documented, influences on global and regional climate, weather, ecosystems, and coastal sea levels. However, continuous, high-frequency, observations of these quantities have been limited to date. Multiple years of full-depth daily observations from moored instruments in the South Atlantic at 34.5°S are combined with satellite observations to resolve the volume transports in both the upper and abyssal MOC cells, and the associated full-depth meridional heat transport (MHT), on daily to interannual timescales. A newly developed method for combining satellite sea level observations with historical hydrographic measurements was used to estimate daily full-depth ocean profiles of temperature in the ocean interior where mooring coverage is sparse. The average MHT during 2013–2017 is 0.5 PW, with a daily standard deviation of 0.8 PW. The MHT variability is most strongly driven by the geostrophic relative velocity contributions (horizontal density-gradient changes). This variability is highly correlated with the volume transport variability of the MOC upper cell (r = 0.96) and modestly anti-correlated (r = −0.52) with the abyssal cell variations. An empirical relationship between the MHT and MOC values was developed allowing the reconstruction of a longer MHT time series including the pilot array period (2009–2010). Seasonal variation of the MHT is significant, and results from strong variations of all terms (Ekman, barotropic, and baroclinic). Although the 2013–2017 shows an increasing MHT trend (0.14 PW/year), the longer time period record suggests that the apparent trend may simply be interannual modulation of MHT at 34.5°S.
Fil: Kersalé, M.. Miami University; Estados Unidos
Fil: Meinen, Christopher S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Perez, R. C.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Speich, S.. Centre National de la Recherche Scientifique. Ecole Normale Supérieure; Francia
Fil: Campos, E. J. D.. Universidade de Sao Paulo; Brasil
Fil: Garzoli, S. L.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Ansorge, I.. University of Cape Town; Sudáfrica
Fil: Volkov, D. L.. University of Miami; Estados Unidos
Fil: Le Hénaff, M.. University of Miami; Estados Unidos
Fil: Dong, S.. Atlantic Oceanographic and Meteorological Laboratory; Estados Unidos
Fil: Lamont, T.. University of Cape Town; Sudáfrica
Fil: Sato, O. T.. Universidade de Sao Paulo; Brasil
Fil: van den Berg, M.. University of Cape Town; Sudáfrica
description Variations in the mass and heat transported by the meridional overturning circulation (MOC) have important, well-documented, influences on global and regional climate, weather, ecosystems, and coastal sea levels. However, continuous, high-frequency, observations of these quantities have been limited to date. Multiple years of full-depth daily observations from moored instruments in the South Atlantic at 34.5°S are combined with satellite observations to resolve the volume transports in both the upper and abyssal MOC cells, and the associated full-depth meridional heat transport (MHT), on daily to interannual timescales. A newly developed method for combining satellite sea level observations with historical hydrographic measurements was used to estimate daily full-depth ocean profiles of temperature in the ocean interior where mooring coverage is sparse. The average MHT during 2013–2017 is 0.5 PW, with a daily standard deviation of 0.8 PW. The MHT variability is most strongly driven by the geostrophic relative velocity contributions (horizontal density-gradient changes). This variability is highly correlated with the volume transport variability of the MOC upper cell (r = 0.96) and modestly anti-correlated (r = −0.52) with the abyssal cell variations. An empirical relationship between the MHT and MOC values was developed allowing the reconstruction of a longer MHT time series including the pilot array period (2009–2010). Seasonal variation of the MHT is significant, and results from strong variations of all terms (Ekman, barotropic, and baroclinic). Although the 2013–2017 shows an increasing MHT trend (0.14 PW/year), the longer time period record suggests that the apparent trend may simply be interannual modulation of MHT at 34.5°S.
publishDate 2021
dc.date.none.fl_str_mv 2021-04
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/11336/165201
Kersalé, M.; Meinen, Christopher S.; Perez, R. C.; Piola, Alberto Ricardo; Speich, S.; et al.; Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S; Blackwell Publishing; Journal of Geophysical Research: Oceans; 126; 5; 4-2021; 1-23
2169-9275
2169-9291
CONICET Digital
CONICET
url http://hdl.handle.net/11336/165201
identifier_str_mv Kersalé, M.; Meinen, Christopher S.; Perez, R. C.; Piola, Alberto Ricardo; Speich, S.; et al.; Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S; Blackwell Publishing; Journal of Geophysical Research: Oceans; 126; 5; 4-2021; 1-23
2169-9275
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://onlinelibrary.wiley.com/doi/10.1029/2020JC016947
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JC016947
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
application/pdf
dc.publisher.none.fl_str_mv Blackwell Publishing
publisher.none.fl_str_mv Blackwell Publishing
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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