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Revista Brasileira de Geofísica

Print version ISSN 0102-261X

Abstract

PEREIRA, Marçal Duarte; SCHETTINI, Carlos Augusto França  and  OMACHI, Claudia Yuki. Caracterização de feições oceanográficas na plataforma de Santa Catarina através de imagens orbitais. Rev. Bras. Geof. [online]. 2009, vol.27, n.1, pp.81-93. ISSN 0102-261X.  http://dx.doi.org/10.1590/S0102-261X2009000100007.

The objective of this paper is to characterize surface small and meso-scale oceanographic features in the Santa Catarina continental shelf, Brazil. The features were identified using MODIS satellite imagery of sea surface temperature (SST) and sea surface chlorophyll (SSC). One daily image was selected for each month of the year 2003, excepting December, aiming to search for seasonality. The oceanographic features were identified by visual inspection, applying different levels of contrast and color palettes to improve the visualization. The features identified were distinguished in eddies, meanders, mushroom like features, plumes, filaments, fronts and upwelling areas. The results indicated that during the summer, the continental shelf is homogeneous with few surface features. The most prominent feature during summer period (January to March) was the upwelling area nearby Santa Marta Cape, southern from Florianópolis Island. During the fall and winter seasons there were more surface features, mainly due to the evolution of the Prata Front system, with smaller SST and higher SSC.

Keywords : coastal oceanography; satellite imagery; MODIS; sea surface temperature; chlorophyll; ocean color.

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