Abstract
A western margin frontal zone is described, from measurements of temperature, salinity and currents, in a section taken with R/V "Prof. W. Besnard" in December 1980, crossing the shelf break border at latitude 26º30'S. The analyses of the sections showed consistently the occurrence of an ascension of the T and S isolines over the shelf break. Simultaneous current measurements showed a surface eddy structure with clockwise circulation and anti-clockwise circulation having a common stem over the break characterizing a shelf break upwelling.
Water temperature; Salinity; Current measurement; Coastal upwelling; Oceanic eddies; Frontal zones; Oceanic fronts; Advection; Southeast coast-Brazil; R/V "Prof. W. Besnard"; Paranaguá; Continental shelf break
NOTAS
Note on the shelf break upwelling off the southeast coast of Brazil (Lat. 26º30'S)
Afrânio Rubens de Mesquita; João Batista de Assis Leite* (* ) Contratados do Convênio IOUSP/FINEP - Subprojeto: Hidrodinâmica costeira. ; Reyner Rizzo* (* ) Contratados do Convênio IOUSP/FINEP - Subprojeto: Hidrodinâmica costeira.
Instituto Oceanográfico da Universidade de São Paulo
SYNOPSIS
A western margin frontal zone is described, from measurements of temperature, salinity and currents, in a section taken with R/V "Prof. W. Besnard" in December 1980, crossing the shelf break border at latitude 26º30'S. The analyses of the sections showed consistently the occurrence of an ascension of the T and S isolines over the shelf break. Simultaneous current measurements showed a surface eddy structure with clockwise circulation and anti-clockwise circulation having a common stem over the break characterizing a shelf break upwelling.
Descriptors: Water temperature, Salinity, Current measurement, Coastal upwelling, Oceanic eddies, Frontal zones, Oceanic fronts, Advection, Southeast coast-Brazil, R/V "Prof. W. Besnard", Paranaguá-PR, Continental shelf break.
Descritores: Temperatura da água, Salinidade, Medição de correntes, Ressurgência costeira, Vórtices oceânicos, Zonas frontais, Frentes oceânicas,Advecção, Costasudeste-Brasil, N/0c."Prof. W. Besnard", Paranaguá-PR, Borda da plataforma.
Full text available only in PDF format.
Texto completo disponível apenas em PDF.
Acknowledgements
This work was financially supported by FINEP - Financiadora de Estudos e Projetos.
(Received 27-Jun-1983; accepted 26-Mar-1984)
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- ______ ; LEITE, J. B. de A. & RIZZO, R. 1979. Contribuição ao estudo das correntes marinhas na plataforma entre Cabo Frio e Cananéia. Bolm Inst. oceanogr., S Paulo, 28(2): 95-100.
- MESQUITA, A. R.; LEITE, J. B. de A. & RIZZO, R. Circulation and evicences of shelf break upwelling (Brazil, Lat.26ş07'S; Long. 47ş39'W). Relat. Cruzeiros Inst. oceanogr., Univ S Paulo, sér. N/Oc. "Prof. W. Besnard" (In preparation).
- MOOERS, C. N. K.; BOICOURT, W. C. 1978. Prograde and retrograde fronts. In: Bowman, M. J. & Esaias, W. E., ed. -Oceanic fronts in coastal processes: proceedings of a workshop held at Marine Sciences Research Center, May 25-27, 1977. Berlin, Springer-Verlag, p. 43-58.
- PINGREE, R. D. 1978. Cyclonic eddies and cross frontal mixing. J. mar. biol. Ass. U.K., 58:955-963
Publication Dates
-
Publication in this collection
31 May 2012 -
Date of issue
1983
History
-
Accepted
26 Mar 1984 -
Received
27 June 1983
