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Saraceno, M.; Provost, C.; Piola, A.R.; Bava, J.; Gagliardini, A. "Brazil Malvinas Frontal System as seen from 9 years of advanced very high resolution radiometer data" (2004) Journal of Geophysical Research C: Oceans. 109(5):C05027 1-14 - C05027 14-14
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Abstract:

Surface thermal fronts in the southwestern Atlantic (SWA) Ocean are examined using 9 years (1987-1995) of advanced very high resolution radiometer data. Fronts are detected considering a gradient based edge detector. Sea surface temperature gradients are calculated from 4 km resolution 5-day composite images covering the western Argentine Basin south of 30°S. Variability in the position and intensity of the fronts from seasonal to interannual timescales is characterized in six regions including different parts of the Brazil Current Front (BCF) and the Subantarctic Front (SAF): Shelf Break-Brazil (SB-B), Brazil Malvinas Collision (BM-C), Brazil Current-Overshoot (BC-O), Shelf Break-Malvinas (SB-M), Malvinas Return Flow (MRF), and Falkland Escarpment (FE). Fronts in the SB-B, SB-M, MRF, and FE regions are controlled by the bathymetry. In the BM-C region the BCF and SAF appear to merge as a single front. This front does not present large seasonal north-south excursions as previously described, though it pivots seasonally around a fixed point located approximately at 39.5°S, 53.5°W, changing its orientation from N-S in winter to NW-SE in summer. Consequently, on average, the front intersects the 1000 m isobath at 38°30′S in summer and north of 37°S in winter. In the BC-O region the BCF has a U-shape centered at 53°W. The intensity of the fronts in each region except in the FE region presents large seasonal variability. In the SB-B, BM-C, and BC-O regions the frontal intensity is highest (>0.35°C/km) during austral winter, the annual components explain 83, 67, and 71% of the total variance, respectively. In the SB-M and MRF regions the SAF is most intense (>0.25°C/km) in summer and fall; the annual component of the intensity fluctuations explains 29 and 38% of the total variance, respectively. In the FE region the annual component of frontal intensity explains only 17% of the variability. In the six regions, important interannual variability is found. The Zapiola Rise (centered at 45°S, 43°W) appears as a gradient-free region. Closed planetary potential vorticity contours in this area suggest it is dynamically isolated. Copyright 2004 by the American Geophysical Union.

Registro:

Documento: Artículo
Título:Brazil Malvinas Frontal System as seen from 9 years of advanced very high resolution radiometer data
Autor:Saraceno, M.; Provost, C.; Piola, A.R.; Bava, J.; Gagliardini, A.
Filiación:Lab. d'Oceanogr. Dynamique Climat, Universite Pierre et Marie Curie, 4 Place Jussieu, Paris cedex 05 F-75252, France
Departamento de Oceanografía, Servicio de Hidrografía Naval, Av. Montes de Oca 2124, Buenos Aires 1271, Argentina
Depto. de Cie. Atmosfera Oceanos, Facultade de Cie. Exactas Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Inst. de Astronomia y Fisica Espacio, Buenos Aires 1428, Argentina
Palabras clave:Brazil Malvinas Conference; Sea surface temperature fronts; Southwest Atlantic; AVHRR; frontal feature; image analysis; remote sensing; sea surface temperature; shelf break; temperature gradient; Atlantic Ocean; Atlantic Ocean (Southwest)
Año:2004
Volumen:109
Número:5
Página de inicio:C05027 1
Página de fin:14 - C05027 14-14
DOI: http://dx.doi.org/10.1029/2003JC002127
Título revista:Journal of Geophysical Research C: Oceans
Título revista abreviado:J. Geophys. Res. C Oceans
ISSN:01480227
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01480227_v109_n5_pC050271_Saraceno

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Citas:

---------- APA ----------
Saraceno, M., Provost, C., Piola, A.R., Bava, J. & Gagliardini, A. (2004) . Brazil Malvinas Frontal System as seen from 9 years of advanced very high resolution radiometer data. Journal of Geophysical Research C: Oceans, 109(5), C05027 1-14 - C05027 14-14.
http://dx.doi.org/10.1029/2003JC002127
---------- CHICAGO ----------
Saraceno, M., Provost, C., Piola, A.R., Bava, J., Gagliardini, A. "Brazil Malvinas Frontal System as seen from 9 years of advanced very high resolution radiometer data" . Journal of Geophysical Research C: Oceans 109, no. 5 (2004) : C05027 1-14 - C05027 14-14.
http://dx.doi.org/10.1029/2003JC002127
---------- MLA ----------
Saraceno, M., Provost, C., Piola, A.R., Bava, J., Gagliardini, A. "Brazil Malvinas Frontal System as seen from 9 years of advanced very high resolution radiometer data" . Journal of Geophysical Research C: Oceans, vol. 109, no. 5, 2004, pp. C05027 1-14 - C05027 14-14.
http://dx.doi.org/10.1029/2003JC002127
---------- VANCOUVER ----------
Saraceno, M., Provost, C., Piola, A.R., Bava, J., Gagliardini, A. Brazil Malvinas Frontal System as seen from 9 years of advanced very high resolution radiometer data. J. Geophys. Res. C Oceans. 2004;109(5):C05027 1-14 - C05027 14-14.
http://dx.doi.org/10.1029/2003JC002127