Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)

Autores
Bilo, Tiago Carrilho; Silveira, Ilson Carlos Almeida da; Belo, Wellington Ceccopieri; Castro, Belmiro Mendes de; Piola, Alberto Ricardo
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Brazil Current (BC) is likely the least observed and investigated subtropical western boundary current in the world. This study proposes a simple and systematic methodology to estimate quasi-synoptic cross-sectional speeds of the BC within the Santos Basin (23∘ S–26∘ S) based on the dynamic method using several combinations of data: Conductivity, temperature, and depth (CTD), temperature profiles, CTD and vessel-mounted Acoustic Doppler Current Profiler (VMADCP), and temperature profiles and VMADCP. All of the geostrophic estimates agree well with lowered Acoustic Doppler Current Profiler (LADCP) velocity observations and yield volume transports of -5.56 ±1.31 and 2.50 ±1.01 Sv for the BC and the Intermediate Western Boundary Current (IWBC), respectively. The LADCP data revealed that the BC flows southwestward and is ∼100 km wide, 500 m deep, and has a volume transport of approximately -5.75 ±1.53 Sv and a maximum speed of 0.59 m s−1. Underneath the BC, the IWBC flows northeastward and has a vertical extent of approximately 1,300 m, a width of ∼60 km, a maximum velocity of ∼0.22 m s−1, and a volume transport of 4.11 ± 2.01 Sv. Our analysis indicates that in the absence of the observed velocities, the isopycnal (σ 0) of 26.82 kg m−3 (∼500 dbar) is an adequate level of no motion for use in geostrophic calculations. Additionally, a simple linear relationship between the temperature and the specific volume anomaly can be used for a reliable first estimate of the BC-IWBC system in temperature-only transects.
Fil: Bilo, Tiago Carrilho. Universidade de Sao Paulo; Brasil
Fil: Silveira, Ilson Carlos Almeida da. Universidade de Sao Paulo; Brasil
Fil: Belo, Wellington Ceccopieri. Centro de Pesquisas e Desenvolvimento "Leopoldo A. Miguez de Mello"; Brasil
Fil: Castro, Belmiro Mendes de. Universidade de Sao Paulo; Brasil
Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Brazil Current
Intermediate Western Boundary Current
Santos Basin Circulation
Geostrophic Estimates
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:11336/35808
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/35808
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)Bilo, Tiago CarrilhoSilveira, Ilson Carlos Almeida daBelo, Wellington CeccopieriCastro, Belmiro Mendes dePiola, Alberto RicardoBrazil CurrentIntermediate Western Boundary CurrentSantos Basin CirculationGeostrophic Estimateshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Brazil Current (BC) is likely the least observed and investigated subtropical western boundary current in the world. This study proposes a simple and systematic methodology to estimate quasi-synoptic cross-sectional speeds of the BC within the Santos Basin (23∘ S–26∘ S) based on the dynamic method using several combinations of data: Conductivity, temperature, and depth (CTD), temperature profiles, CTD and vessel-mounted Acoustic Doppler Current Profiler (VMADCP), and temperature profiles and VMADCP. All of the geostrophic estimates agree well with lowered Acoustic Doppler Current Profiler (LADCP) velocity observations and yield volume transports of -5.56 ±1.31 and 2.50 ±1.01 Sv for the BC and the Intermediate Western Boundary Current (IWBC), respectively. The LADCP data revealed that the BC flows southwestward and is ∼100 km wide, 500 m deep, and has a volume transport of approximately -5.75 ±1.53 Sv and a maximum speed of 0.59 m s−1. Underneath the BC, the IWBC flows northeastward and has a vertical extent of approximately 1,300 m, a width of ∼60 km, a maximum velocity of ∼0.22 m s−1, and a volume transport of 4.11 ± 2.01 Sv. Our analysis indicates that in the absence of the observed velocities, the isopycnal (σ 0) of 26.82 kg m−3 (∼500 dbar) is an adequate level of no motion for use in geostrophic calculations. Additionally, a simple linear relationship between the temperature and the specific volume anomaly can be used for a reliable first estimate of the BC-IWBC system in temperature-only transects.Fil: Bilo, Tiago Carrilho. Universidade de Sao Paulo; BrasilFil: Silveira, Ilson Carlos Almeida da. Universidade de Sao Paulo; BrasilFil: Belo, Wellington Ceccopieri. Centro de Pesquisas e Desenvolvimento "Leopoldo A. Miguez de Mello"; BrasilFil: Castro, Belmiro Mendes de. Universidade de Sao Paulo; BrasilFil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaSpringer Heidelberg2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/35808Bilo, Tiago Carrilho ; Silveira, Ilson Carlos Almeida da ; Belo, Wellington Ceccopieri; Castro, Belmiro Mendes de; Piola, Alberto Ricardo; Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S); Springer Heidelberg; Ocean Dynamics; 64; 10; 8-2014; 1431-14461616-73411616-7228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-014-0761-2info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10236-014-0761-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T14:34:53Zoai:ri.conicet.gov.ar:11336/35808instacron: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:34982025-12-23 14:34:54.153CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
title Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
spellingShingle Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
Bilo, Tiago Carrilho
Brazil Current
Intermediate Western Boundary Current
Santos Basin Circulation
Geostrophic Estimates
title_short Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
title_full Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
title_fullStr Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
title_full_unstemmed Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
title_sort Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S)
dc.creator.none.fl_str_mv Bilo, Tiago Carrilho
Silveira, Ilson Carlos Almeida da
Belo, Wellington Ceccopieri
Castro, Belmiro Mendes de
Piola, Alberto Ricardo
author Bilo, Tiago Carrilho
author_facet Bilo, Tiago Carrilho
Silveira, Ilson Carlos Almeida da
Belo, Wellington Ceccopieri
Castro, Belmiro Mendes de
Piola, Alberto Ricardo
author_role author
author2 Silveira, Ilson Carlos Almeida da
Belo, Wellington Ceccopieri
Castro, Belmiro Mendes de
Piola, Alberto Ricardo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Brazil Current
Intermediate Western Boundary Current
Santos Basin Circulation
Geostrophic Estimates
topic Brazil Current
Intermediate Western Boundary Current
Santos Basin Circulation
Geostrophic Estimates
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 Brazil Current (BC) is likely the least observed and investigated subtropical western boundary current in the world. This study proposes a simple and systematic methodology to estimate quasi-synoptic cross-sectional speeds of the BC within the Santos Basin (23∘ S–26∘ S) based on the dynamic method using several combinations of data: Conductivity, temperature, and depth (CTD), temperature profiles, CTD and vessel-mounted Acoustic Doppler Current Profiler (VMADCP), and temperature profiles and VMADCP. All of the geostrophic estimates agree well with lowered Acoustic Doppler Current Profiler (LADCP) velocity observations and yield volume transports of -5.56 ±1.31 and 2.50 ±1.01 Sv for the BC and the Intermediate Western Boundary Current (IWBC), respectively. The LADCP data revealed that the BC flows southwestward and is ∼100 km wide, 500 m deep, and has a volume transport of approximately -5.75 ±1.53 Sv and a maximum speed of 0.59 m s−1. Underneath the BC, the IWBC flows northeastward and has a vertical extent of approximately 1,300 m, a width of ∼60 km, a maximum velocity of ∼0.22 m s−1, and a volume transport of 4.11 ± 2.01 Sv. Our analysis indicates that in the absence of the observed velocities, the isopycnal (σ 0) of 26.82 kg m−3 (∼500 dbar) is an adequate level of no motion for use in geostrophic calculations. Additionally, a simple linear relationship between the temperature and the specific volume anomaly can be used for a reliable first estimate of the BC-IWBC system in temperature-only transects.
Fil: Bilo, Tiago Carrilho. Universidade de Sao Paulo; Brasil
Fil: Silveira, Ilson Carlos Almeida da. Universidade de Sao Paulo; Brasil
Fil: Belo, Wellington Ceccopieri. Centro de Pesquisas e Desenvolvimento "Leopoldo A. Miguez de Mello"; Brasil
Fil: Castro, Belmiro Mendes de. Universidade de Sao Paulo; Brasil
Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The Brazil Current (BC) is likely the least observed and investigated subtropical western boundary current in the world. This study proposes a simple and systematic methodology to estimate quasi-synoptic cross-sectional speeds of the BC within the Santos Basin (23∘ S–26∘ S) based on the dynamic method using several combinations of data: Conductivity, temperature, and depth (CTD), temperature profiles, CTD and vessel-mounted Acoustic Doppler Current Profiler (VMADCP), and temperature profiles and VMADCP. All of the geostrophic estimates agree well with lowered Acoustic Doppler Current Profiler (LADCP) velocity observations and yield volume transports of -5.56 ±1.31 and 2.50 ±1.01 Sv for the BC and the Intermediate Western Boundary Current (IWBC), respectively. The LADCP data revealed that the BC flows southwestward and is ∼100 km wide, 500 m deep, and has a volume transport of approximately -5.75 ±1.53 Sv and a maximum speed of 0.59 m s−1. Underneath the BC, the IWBC flows northeastward and has a vertical extent of approximately 1,300 m, a width of ∼60 km, a maximum velocity of ∼0.22 m s−1, and a volume transport of 4.11 ± 2.01 Sv. Our analysis indicates that in the absence of the observed velocities, the isopycnal (σ 0) of 26.82 kg m−3 (∼500 dbar) is an adequate level of no motion for use in geostrophic calculations. Additionally, a simple linear relationship between the temperature and the specific volume anomaly can be used for a reliable first estimate of the BC-IWBC system in temperature-only transects.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
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/11336/35808
Bilo, Tiago Carrilho ; Silveira, Ilson Carlos Almeida da ; Belo, Wellington Ceccopieri; Castro, Belmiro Mendes de; Piola, Alberto Ricardo; Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S); Springer Heidelberg; Ocean Dynamics; 64; 10; 8-2014; 1431-1446
1616-7341
1616-7228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/35808
identifier_str_mv Bilo, Tiago Carrilho ; Silveira, Ilson Carlos Almeida da ; Belo, Wellington Ceccopieri; Castro, Belmiro Mendes de; Piola, Alberto Ricardo; Methods for estimating the velocities of the Brazil Current in the pre-salt reservoir area off southeast Brazil (23º S-26º S); Springer Heidelberg; Ocean Dynamics; 64; 10; 8-2014; 1431-1446
1616-7341
1616-7228
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-014-0761-2
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10236-014-0761-2
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 Springer Heidelberg
publisher.none.fl_str_mv Springer Heidelberg
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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score 12.952241

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