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Piola, A.R.; Campos, E.J.D.; Möller Jr., O.O.; Charo, M.; Martinez, C. "Subtropical shelf front off eastern South America" (2000) Journal of Geophysical Research: Oceans. 105(C3):6565-6578
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Abstract:

Historical hydrographic data from the continental shelf off eastern South America are used to examine the thermohaline properties of the water masses in the region between 20° S and 40° S. The continental shelf water masses are originated by dilution of open ocean waters of the western boundary currents of the South Atlantic Ocean. On the basis of temperature-salinity relation, two distinct water masses are identified, namely, the Subantarctic Shelf Water and the Subtropical Shelf Water. Subantarctic Shelf Water originates by dilution of Subantarctic Water, primarily in the southeast Pacific, due to excess precipitation and continental runoff and enters the continental shelf near 55° S. The Subtropical Shelf Water is modified South Atlantic Central Water diluted by continental runoff from the coast of Brazil. In addition, substantial dilution of the upper shelf waters takes place at the mouth of Río de la Plata (approximately located at 36° S) and, in a lesser extent, at the Patos-Mirim Lagoon (at 32° S). The Rio de la Plata and the Patos outflows form a low-salinity tongue that caps the shelf water leading to a salinity decrease to values <30. The low-salinity tongue extends northward over the shelf penetrating farther north in winter than in summer. The extent of the low-salinity water has a strong impact on the vertical stratification and acts to limit winter convection to the layer above the halocline. There is little or no indication of mixing between Subantarctic Shelf Water and Subtropical Shelf Water. An intense temperature, salinity, and nutrient front separates these water masses. The front is oriented along the north-south direction, located on average near the 50 m isobath at 32° S and extends southward toward the shelf break near 36° S. Between 32° and 34° S the Subtropical Shelf Front follows the 100 to 200 m isobaths and separates Subantarctic Shelf Water from the oceanic South Atlantic Central Water. On the basis of the temperature and salinity distributions, beneath the low-salinity surface layer, the Subtropical Shelf Front appears as an extension of the Brazil-Malvinas Confluence over the continental shelf of South America. Thus the location of the Subtropical Shelf Front may be linked to the migrations of the separation point of the Brazil-Malvinas Confluence from the continental slope. Copyright 2000 by the American Geophysical Union.

Registro:

Documento: Artículo
Título:Subtropical shelf front off eastern South America
Autor:Piola, A.R.; Campos, E.J.D.; Möller Jr., O.O.; Charo, M.; Martinez, C.
Filiación:Departamento Oceanografía, Servicio de Hidrografia Naval, Buenos Aires, Argentina
Depto. Cie. Atmosfera y Los Oceanos, Fac. de Ciencias Exactes y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Instituto Oceanográfico, Universidade de São Paulo, São Paulo, Brazil
Fund. Universidade do Rio Grande, Rio Grande, Brazil
Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
Instituto Oceanográfico, Universidade de São Paulo, São Paulo, SP 05508-900, Brazil
Departameto Oceanografía, Servicio de Hidrografía Naval, Av. Montes de Oca 2124, 1271 Buenos Aires, Argentina
Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
Fund. Universidade do Rio Grande, Caixa Postal 474, Rio Grande, RS 96201-900, Brazil
Palabras clave:salinity; temperature; thermohaline structure; water mass; South America
Año:2000
Volumen:105
Número:C3
Página de inicio:6565
Página de fin:6578
Título revista:Journal of Geophysical Research: Oceans
Título revista abreviado:J. Geophys. Res. C Oceans
ISSN:21699291
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699291_v105_nC3_p6565_Piola

Referencias:

  • Agra, C., Nof, D., Collision and separation of boundary currents (1993) Deep Sea Res., 40, pp. 2259-2282
  • Bakum, A., Parrish, R.H., Comparative studies of coastal pelagic fish reproductive habitats: The Brazilian sardine (Sardinella aurita) (1990) J. Cons. Int. Explor. Mer., 46, pp. 269-283
  • Bakum, A., Parrish, R.H., Comparative studies of coastal pelagic fish reproductive habitats: The anchovy (Engraulis anchoita) of the southwestern Atlantic (1991) ICES J. Mar. Sci., 48, pp. 343-361
  • Balech, E., Estudio crítico de las corrientes marinas (1949) Physis, 20, pp. 159-164
  • Balech, E., Notas historiées y críticas de la oceanografía biológica argentina (1971) H-1027, 57p. , Serv. Hidrografía Nav., Buenos Aires
  • Baumgartner, A., Reichel, E., (1975) The World Water Balance, 179p. , Elsevier Sci., New York
  • Boltovskoy, E., Masas de agua (característica, distribución, movimientos) en la superficie del Atlántico Sudoeste, según indicadores biológicos (1970) H-643, 99p. , Serv. Hidrografía. Nav., Buenos Aires
  • Boltovskoy, E., Masas de agua en el Atlántico Sudoccidental (1981) Atlas del Zooplankton del Atlántico Sudoccidental, pp. 227-237p. , edited by D. Boltovskoy, Inst. Nac. Inv. Des. Pesquero, Mar del Plata, Argentina
  • Brandhorst, W., Castello, J.P., Evaluación de los recursos de anchoíta (Engraulis anchoita) frente a Ia Argentina y Uruguay, I, Las condiciones oceanográficas, sinopsis del conocimiento actual sobre la anchoíta y el plan para su evaluación (1971) Proy. Des. Pesq. Publ., 29, 63p. , Food and Agric. Org., Rome
  • Bunker, A.J., Goldsmith, R.A., Archived time-series of Atlantic Ocean meteorological variables and surface fluxes (1979) Tech. Rep., pp. 1-29. , WHOI 79-3, Woods Hole Oceanogr. Inst., Woods Hole, Mass
  • Campos, E.J.D., Gonçalves, J.E., Ikeda, Y., Water mass characteristics and geostrophic circulation in the South Brazil Bight: Summer of 1991 (1995) J. Geophys. Res., 100, pp. 18,537-18,550
  • Campos, E.J.D., Ikeda, Y., Castro, B.M., Gaeta, S.A., Lorenzzetti, J.A., Stevenson, M.R., Experiment studies circulation in the western South Atlantic (1996) Eos Trans. AGU, 77 (27), pp. 253-259
  • Campos, E.J.D., Lorenzzetti, J.A., Stevenson, M.R., Stech, J.L., De Souza, R.B., Penetration of waters from the Brazil-Malvinas Confluence region along the South American continental shelf up to 28°S (1996) Ann. Acad. Bras. Cienc., 68 (1 SUPPL.), pp. 49-58
  • Campos, E.J.D., Lentini, C., Miller, J., Piola, A.R., Interannual variability of the sea surface temperature in the South Brazil Bight (1999) Geophys. Res. Lett., 26, pp. 2061-2064
  • Castello, J.P., Möller Jr., O.O., Sobre as condições oceanográficas no Rio Grande do Sul (1977) Atlântica, 2, pp. 25-110
  • Castro, B.M., Miranda, L.B., Miyao, S.Y., Condições oceanográficas na plataforma continental ao largo de Ubatuba: Variações sazonais e em média escala (1987) Bol. Inst. Oceanogr. Univ. São Paulo, 35, pp. 135-151
  • Castro, B.M., Miranda, L.B., Physical oceanography of the western Atlantic continental shelf located between 4°N and 34°S (1998) The Sea, 11, pp. 209-251. , edited by A.R. Robinson and K.H. Brink, chap. 8, John Wiley, New York
  • Ciotti, A.M., Odebrecht, C., Fillmann, G., Möller Jr., O.O., Freshwater outflow and Subtropical Convergence influence on phytoplankton biomass on the southern Brazilian continental shelf (1995) Com. Shelf Res., 15, pp. 1737-1756
  • Deacon, G.E.R., The hydrology of the Southern Ocean (1933) Discovery Rep., 7, pp. 171-238
  • Depetris, P.J., Kempe, S., Latif, M., Mook, W.G., ENSO controlled flooding in the Paraná River (1904-1991) (1996) Naturwissenschaften, 83, pp. 127-129
  • Forbes, M.C., Garraffo, Z., A note on the mean seasonal transport on the Argentinian Shelf (1988) J. Geophys. Res., 93, pp. 2311-2319
  • Framiñan, M.B., Etala, M.P., Acha, E.M., Guerrero, R.A., Lasta, C.A., Brown, O.B., Physical characteristics and processes of the Río de la Plata Estuary (1999) Estuaries of South America: Their Geomorphology and Dynamics, pp. 161-194. , edited by G.M. Perillo, M.C. Piccolo, and M. Pino-Quivira, chap. 8, Springer-Verlag, New York
  • García, N.O., Vargas, W.M., The temporal variability in the Río de la Plata basin displayed by the rivers discharges (1998) Clim. Change, 38, pp. 359-379
  • Garzoli, S.L., Garraffo, Z., Transport, frontal motions and eddies at the Brazil-Malvinas Confluence (1989) Deep Sea Res., Part A, 36, pp. 671-703
  • Garzoli, S.L., Giulivi, C.F., What forces the variability of the southwestern Atlantic boundary currents? (1994) Deep Sea Res., Part I, 41, pp. 1527-1550
  • Glorioso, P.D., Flather, R.A., A barotropic model of the currents off SE South America (1995) J. Geophys. Res., 100, pp. 13,427-13,440
  • Goni, G., Kamholz, S., Garzoli, S., Olson, D., Dynamics of the Brazil-Malvinas Confluence based on inverted echo sounders and altimetry (1996) J. Geophys. Res., 101, pp. 16,273-16,289
  • Gordon, A.L., Brazil-Malvinas Confluence - 1984 (1989) Deep Sea Res., Part A, 36, pp. 359-384
  • Guerrero, R.A., Piola, A.R., Masas de agua en la plataforma continental (1997) El Mar Argentino Y Sus Recursos Pesqueros, 1, pp. 107-118. , edited by E.E. Boschi, Inst. Nac. de Invest. y Desarrollo Pesquero, Mar del Plata, Argentina
  • Guerrero, R.A., Acha, E.M., Framiñan, M.B., Lasta, C.A., Physical oceanography of the Rio de la Plata Estuary (1997) Cont. Shelf Res., 17, pp. 727-742
  • Guerrero, R.A., Lasta, C.A., Acha, E.M., Mianzan, H.W., Framiñan, M.B., (1997) Atlas Hidrográfico del Río de la Plata, 109p. , Comisión Admin. del Río de la Plata, Inst. Nac. de Invest. y Desarrollo Pesquero, Buenos Aires
  • Hellerman, S., Rosenstein, M., Normal monthly wind stress over the world ocean with error estimates (1983) J. Phys. Oceanogr., 13, pp. 1093-1104
  • Höflich, O., Climate of the South Atlantic (1984) Climates of the Oceans, World Surv. of Climatol., 15, pp. 1-132. , edited by H. Van Loon, Elsevier Sci., New York
  • Kourafalou, V.H., Oey, L.-Y., Wang, J.D., Lee, T.N., The fate of river discharge on the continental shelf, 1, Modeling the river plume and the inner shelf coastal current (1996) J. Geophys. Res., 101, pp. 3415-3434
  • Krepper, C.M., Difusión del agua proveniente del Estrecho de Magallanes en las aguas de la plataforma continental (1977) Acta Oceanogr. Argent., 1, pp. 49-65
  • Lebedev, I., Nof, D., The drifting confluence zone (1996) J. Phys. Oceanogr., 26, pp. 2429-2448
  • Lima, I.D., García, C.A.E., Möller Jr., O.O., Ocean surface processes on the southern Brazilian shelf: Characterization and seasonal variability (1996) Cont. Shelf Res., 16, pp. 1307-1317
  • Lusquiños, A.J., Algunas características de las aguas de la plataforma continental Argentina, in Datos y resultados de las campañas Pesquería (1971) Pesquería X, Publ. 10/X, , edited by S.F. Villanueva, Proyecto de Desarrollo Pesquero, Ser. de Inf. Técnicos, Mar del Plata, Argentina
  • Lusquiños, A.J., Schrott, A.G., (1983) Corrientes en el Mar Epicontinental Argentino en Invierno, 74p. , Subsecr. de Estado de Cienc. y Técnica, Programa Nac. de Recursos Nat. Renovables, Buenos Aires
  • Lusquiños, A.J., Valdéz, A.J., Aportes al conocimiento de las masas de agua del Atlántico Sudoccidental (1971) H 659, 48p. , Serv. Hidrografía Nav., Buenos Aires
  • Matano, R.P., On the separation of the Brazil Current from the coast (1993) J. Phys. Oceanogr., 23, pp. 79-90
  • Matano, R.P., Schlax, M.G., Chelton, D.B., Seasonal variability in the Southwestern Atlantic (1993) J. Geophys. Res., 98, pp. 18,027-18,035
  • Matsuura, Y., A probable cause of recruitment failure of the Brazilian sardine sardinella aurita population during the 1974/75 spawning season (1996) S. Afr. J. Mar. Sci., 17, pp. 29-35
  • Miranda, L.B., Castro, B.M., Geostrophic flow conditions of the Brazil Current at 19°S (1981) Cienc. Interam., 22, pp. 44-48
  • Möller Jr., O.O., (1996) Hydrodynamique de la Lagune dos Patos: Mesures et Modelisation, 204p. , D.Sc. thesis, Univ. Bordeaux 1, Bordeaux, France
  • Möller Jr., O.O., Paim, P.S., Soares, I.D., Facteurs et mecanismes de la circulation des eaux dans l'estuaire de la Lagune dos Patos (RS, Brasil) (1991) Bull. Inst. Geol. Bassin Aquitaine, 49, pp. 15-21
  • Olson, D.L., Podestá, G.P., Evans, R.H., Brown, O.B., Temporal variations in the separation of the Brazil and Malvinas Currents (1988) Deep Sea Res., Part A, 35, pp. 1971-1990
  • Pereira, C.S., Seasonal variability in the coastal circulation on the Brazilian continental shelf (29°S-35°S) (1989) Conf. Shelf Res., 9, pp. 285-299
  • Piola, A.R., Gordon, A.L., Intermediate waters in the southwest South Atlantic (1989) Deep Sea Res., Part A, 36, pp. 1-16
  • Piola, A.R., Rivas, A.L., Corrientes en la plataforma continental (1997) El Mar Argentino Y Sus Recursos Pesqueros, 1, pp. 119-132. , edited by E.E. Boschi, Inst. Nac. de Invest. y Desarrollo Pesquero, Mar del Plata, Argentina
  • Podestá, G.P., Brown, O.B., Evans, R.H., The annual cycle of satellite-derived sea surface temperature in the southwestern Atlantic Ocean (1991) J. Clim., 4, pp. 457-467
  • Provost, C., Garcia, O., Garçon, V., Analysis of satellite sea surface temperature time series in the Brazil-Malvinas current confluence region: Dominance of the annual and semiannual periods (1992) J. Geophys. Res., 97, pp. 17,841-17,858
  • Provost, C., Gana, S., Garçon, V., Maamaatuaiahutapu, K., England, M., Hydrographic conditions in the Brazil-Malvinas Confluence during austral summer 1990 (1995) J. Geophys. Res., 100, pp. 10,655-10,678
  • Rivas, A.L., Current meter observations in the Argentine Continental Shelf (1997) Conf. Shelf Res., 17, pp. 391-406
  • Rivas, A.L., Frank Langer, A., Mass and heat transport in the Argentinian Continental Shelf (1996) Cont. Shelf Res., 16, pp. 1283-1295
  • Smith, L.T., Chassignet, E.P., Olson, D.B., Wind forced variations in the Brazil-Malvinas confluence region as simulated in a coarse resolution numerical model of the South Atlantic (1994) J. Geophys. Res., 99, pp. 5095-5117
  • Stevenson, M.R., Recirculation of the Brazil Current south of 23°S (1996) Int. WOCE Newsl., 22, pp. 30-32
  • Global river discharge data base (1996) International Hydrological Programme, Vol. V, South America, 5, 123p. , Paris
  • Zavialov, P.O., Ghisolfi, R.D., Garcia, C.A.E., An inverse model for seasonal circulation over the South Brazilian Shelf: Near-surface velocity from the heat budget (1998) J. Phys. Oceanogr., 28, pp. 545-562

Citas:

---------- APA ----------
Piola, A.R., Campos, E.J.D., Möller Jr., O.O., Charo, M. & Martinez, C. (2000) . Subtropical shelf front off eastern South America. Journal of Geophysical Research: Oceans, 105(C3), 6565-6578.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699291_v105_nC3_p6565_Piola [ ]
---------- CHICAGO ----------
Piola, A.R., Campos, E.J.D., Möller Jr., O.O., Charo, M., Martinez, C. "Subtropical shelf front off eastern South America" . Journal of Geophysical Research: Oceans 105, no. C3 (2000) : 6565-6578.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699291_v105_nC3_p6565_Piola [ ]
---------- MLA ----------
Piola, A.R., Campos, E.J.D., Möller Jr., O.O., Charo, M., Martinez, C. "Subtropical shelf front off eastern South America" . Journal of Geophysical Research: Oceans, vol. 105, no. C3, 2000, pp. 6565-6578.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699291_v105_nC3_p6565_Piola [ ]
---------- VANCOUVER ----------
Piola, A.R., Campos, E.J.D., Möller Jr., O.O., Charo, M., Martinez, C. Subtropical shelf front off eastern South America. J. Geophys. Res. C Oceans. 2000;105(C3):6565-6578.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699291_v105_nC3_p6565_Piola [ ]