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
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/165201
Ver los metadatos del registro completo
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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 Técnicas2025-10-22T12:06:29Zoai: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:34982025-10-22 12:06:30.18CONICET 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 |
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eng |
| language |
eng |
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info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1029/2020JC016947 info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JC016947 |
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Blackwell Publishing |
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Blackwell Publishing |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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