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dc.contributor.author
Aubone, N.
dc.contributor.author
Palma, Elbio Daniel
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dc.contributor.author
Piola, Alberto Ricardo
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dc.date.available
2021-08-23T15:43:53Z
dc.date.issued
2021-02
dc.identifier.citation
Aubone, N.; Palma, Elbio Daniel; Piola, Alberto Ricardo; The surface salinity maximum of the South Atlantic; Pergamon-Elsevier Science Ltd; Progress In Oceanography; 191; 2-2021; 1-30
dc.identifier.issn
0079-6611
dc.identifier.uri
http://hdl.handle.net/11336/138707
dc.description.abstract
Like most other ocean basins, the maximum sea surface salinity region (MSR) in the South Atlantic shows a large displacement from the region of maximum difference between evaporation and precipitation (E-P), suggesting that ocean processes play a key role in determining the location of the MSR. We use outputs from a general circulation model (ECCO v4r3) to analyze the mixed layer salinity balance and disentangle the interaction of atmospheric forcing and oceanic processes in both regions. The MSR balance is dominated by evaporative surface fluxes and entrainment, while advection and diffusion play a secondary role. On the other hand, in the region of maximum E-P, the high surface freshwater loss is partially compensated by horizontal advection of low salinity waters, which is responsible for decreasing the salinity below that observed in the MSR. Using a particle tracking model, we find that MSR waters originate mostly from re-circulation in the Tropical South Atlantic and from the Tropical North Atlantic and Indian Oceans. After reaching the MSR, most of those waters flow southward in austral summer along the Brazil Current (1.6 Sv, 1 Sv = 106 m3 s−1), and northward in winter along the North Brazil Current (3.5 Sv). This seasonal variability in the fate of the salty water is modulated by the seasonal migration of the South Equatorial Current bifurcation region. Tracking of particles released at the base of the MSR mixed layer shows a subducted salt river with an estimated transport of 2.6 Sv on the 25.2 kg m−3 neutral density surface that flows northward along the North Brazil Current and retroflects just north of the equator as part of the Equatorial Undercurrent. These high-salinity waters are a significant contributor to the upper limb of the Atlantic meridional overturning circulation and the eastern Tropical Atlantic and their variability.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MAXIMUM SALINITY REGION
dc.subject
MIXED LAYER
dc.subject
SALINITY BUDGET
dc.subject
SALT RIVER
dc.subject
SOUTH ATLANTIC OCEAN
dc.subject
SOUTH EQUATORIAL CURRENT BIFURCATION
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The surface salinity maximum of the South Atlantic
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-08-19T19:57:44Z
dc.journal.volume
191
dc.journal.pagination
1-30
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Aubone, N.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina
dc.description.fil
Fil: Palma, Elbio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
dc.description.fil
Fil: Piola, Alberto Ricardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Instituto Franco-argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Progress In Oceanography
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0079661120302342
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.pocean.2020.102499
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