Evidence of double diffusion in the Brazil-Malvinas Confluence
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 B...
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2002
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| LEADER | 10375caa a22009377a 4500 | ||
|---|---|---|---|
| 001 | PAPER-12747 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204256.0 | ||
| 008 | 190411s2002 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0036140277 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Bianchi, A.A. | |
| 245 | 1 | 0 | |a Evidence of double diffusion in the Brazil-Malvinas Confluence |
| 260 | |c 2002 | ||
| 270 | 1 | 0 | |m Bianchi, A.A.; Departamento Oceanografiá, Servicio de Hidrografiá Naval, Av. Montes de Oca 2124, 1271 Buenos Aires, Argentina; email: abianchi@hidro.gov.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Kelley, D.E., (1986) Oceanic thermohaline staircases, , Ph.D. dissertation, Dalhousie University, Halifax, Nova Scotia | ||
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| 504 | |a Osiroff, A.P., Charo, M., Piola, A.R., Bianchi, A.A., (1993) Datos fisico-químicos, CTD y XBT, campañas oceanográficas OA-04-91, EH-04-92 y EA-01-92, , Informe Técnico, 72, Servicio de Hidrografia Naval, Buenos Aires, Argentina, 176pp | ||
| 504 | |a Piola, A.R., Georgi, D.T., Circumpolar properties of Antarctic Intermediate Water and Subantarctic Mode Water (1982) Deep-Sea Research, 29, pp. 687-712 | ||
| 504 | |a Piola, A.R., Gordon, A.L., Intermediate waters in the southwest South Atlantic (1989) Deep-Sea Research, 36, pp. 1-16 | ||
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| 504 | |a St. Laurent, L., Schmitt, R.W., The contribution of salt fingers to vertical mixing in the North Atlantic tracer release experiment (1999) Journal of Physical Oceanography, 29, pp. 1404-1424 | ||
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| 504 | |a Wüst, G., (1935) The Stratosphere of the Atlantic Ocean (English translation 1980), , Emery W. (Ed.). Amerind Publishing, New Delhi, 112pp | ||
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| 520 | 3 | |a 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. |l eng | |
| 536 | |a Detalles de la financiación: Inter-American Institute for Global Change Research | ||
| 536 | |a Detalles de la financiación: The manuscript was significantly improved after the thorough review by and discussions with Eric Kunze and Daniel Kelley. Additional suggestions from an anonymous reviewer are kindly acknowledged. Marcela Charo prepared most of the graphics. Financial support for the field work was provided by Servicio de Hidrografı́a Naval (SHN), Argentina. Data processing was financed by SHN and the Inter-American Institute for Global Change Research through a Cooperative Research Network grant. We are also indebted to the crew members of the research vessel Cap. Oca Balda , who collaborated to obtain the valuable data used in this paper. | ||
| 593 | |a Departamento Oceanografiá, Servicio de Hidrografiá Naval, Av. Montes de Oca 2124, 1271 Buenos Aires, Argentina | ||
| 593 | |a Departamento Cs. De la Atmósfera y los Océanos, FCEYN, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a BRAZIL/MALVINAS CONFLUENCE |
| 690 | 1 | 0 | |a DOUBLE DIFFUSION |
| 690 | 1 | 0 | |a MIXING |
| 690 | 1 | 0 | |a SALT FINGER |
| 690 | 1 | 0 | |a SOUTHWESTERN ATLANTIC |
| 690 | 1 | 0 | |a SALINITY MEASUREMENT |
| 690 | 1 | 0 | |a SEAWATER |
| 690 | 1 | 0 | |a THERMAL DIFFUSION |
| 690 | 1 | 0 | |a BAROCLINICITY |
| 690 | 1 | 0 | |a OCEANOGRAPHY |
| 690 | 1 | 0 | |a DOUBLE DIFFUSION |
| 690 | 1 | 0 | |a FINGERING |
| 690 | 1 | 0 | |a SALINITY |
| 690 | 1 | 0 | |a VERTICAL MIXING |
| 690 | 1 | 0 | |a WATER MASS |
| 690 | 1 | 0 | |a ATLANTIC OCEAN |
| 700 | 1 | |a Piola, A.R. | |
| 700 | 1 | |a Collino, G.J. | |
| 773 | 0 | |d 2002 |g v. 49 |h pp. 41-52 |k n. 1 |p Deep-Sea Res. Part I Oceanogr. Res. Pap. |x 09670637 |w (AR-BaUEN)CENRE-4388 |t Deep-Sea Research Part I: Oceanographic Research Papers | |
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