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Bianchi, A.A.; Piola, A.R.; Collino, G.J. "Evidence of double diffusion in the Brazil-Malvinas Confluence" (2002) Deep-Sea Research Part I: Oceanographic Research Papers. 49(1):41-52
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Abstract:

Observation of thermohaline staircases and low-density ratios in the Brazil-Malvinas Confluence (BMC) suggests salt-fingering activity between the high salinity South Atlantic Central Water and low salinity Antarctic Intermediate Water. Vertical salt-finger induced salt fluxes are estimated in the BMC using a model for fastest growing fingers. Maximum salt-finger fluxes of 39.9 × 10-10 W kg-1 (5.3 × 10-7 m s-1) were estimated, similar to existing estimates in a Mediterranean salt lens embedded within the North Atlantic water. The fluxes normalized by the large-scale property gradients lead to fairly large estimates of diapycnal haline and thermal diffusivities, of up to 0.74 × 10-4 and 0.34 × 10-4 m2s-1, respectively, showing the enhancement of the haline diffusivity due to salt fingers. Estimated diffusive-convection fluxes based on flux laws derived from laboratory experiments are two orders of magnitude larger than salt-finger fluxes. These results suggest that, where cross-front interleaving leads to layering of relatively cold-fresh water over warm-salty water, diffusive upward convection dominates the vertical property fluxes in the frontal region. It appears that on the warm-salty side of the BMC, away from the narrow band dominated by interleaving, salt-finger integrated vertical fluxes nearly balance the cross-front lateral integrated fluxes. The effect of baroclinicity on the vertical property fluxes was evaluated and it was found that, in the BMC, the baroclinicity enhances the interleaving. © 2001 Elsevier Science Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Evidence of double diffusion in the Brazil-Malvinas Confluence
Autor:Bianchi, A.A.; Piola, A.R.; Collino, G.J.
Filiación:Departamento Oceanografiá, Servicio de Hidrografiá Naval, Av. Montes de Oca 2124, 1271 Buenos Aires, Argentina
Departamento Cs. De la Atmósfera y los Océanos, FCEYN, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Brazil/Malvinas Confluence; Double diffusion; Mixing; Salt finger; Southwestern Atlantic; Salinity measurement; Seawater; Thermal diffusion; Baroclinicity; Oceanography; double diffusion; fingering; salinity; vertical mixing; water mass; Atlantic Ocean
Año:2002
Volumen:49
Número:1
Página de inicio:41
Página de fin:52
DOI: http://dx.doi.org/10.1016/S0967-0637(01)00039-5
Título revista:Deep-Sea Research Part I: Oceanographic Research Papers
Título revista abreviado:Deep-Sea Res. Part I Oceanogr. Res. Pap.
ISSN:09670637
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v49_n1_p41_Bianchi

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Citas:

---------- APA ----------
Bianchi, A.A., Piola, A.R. & Collino, G.J. (2002) . Evidence of double diffusion in the Brazil-Malvinas Confluence. Deep-Sea Research Part I: Oceanographic Research Papers, 49(1), 41-52.
http://dx.doi.org/10.1016/S0967-0637(01)00039-5
---------- CHICAGO ----------
Bianchi, A.A., Piola, A.R., Collino, G.J. "Evidence of double diffusion in the Brazil-Malvinas Confluence" . Deep-Sea Research Part I: Oceanographic Research Papers 49, no. 1 (2002) : 41-52.
http://dx.doi.org/10.1016/S0967-0637(01)00039-5
---------- MLA ----------
Bianchi, A.A., Piola, A.R., Collino, G.J. "Evidence of double diffusion in the Brazil-Malvinas Confluence" . Deep-Sea Research Part I: Oceanographic Research Papers, vol. 49, no. 1, 2002, pp. 41-52.
http://dx.doi.org/10.1016/S0967-0637(01)00039-5
---------- VANCOUVER ----------
Bianchi, A.A., Piola, A.R., Collino, G.J. Evidence of double diffusion in the Brazil-Malvinas Confluence. Deep-Sea Res. Part I Oceanogr. Res. Pap. 2002;49(1):41-52.
http://dx.doi.org/10.1016/S0967-0637(01)00039-5