Seasonal variability of SST fronts and winds on the southeastern continental shelf of Brazil

摘要: Fourteen years (September 2002 to August 2016) of high-resolution satellite observations sea surface temperature (SST) data are used describe the frontal pattern and frontogenesis on southeastern continental shelf Brazil. The daily SST fronts obtained using an edge-detection algorithm, monthly probability (FP) is subsequently calculated. High FPs mainly distributed along coast decrease with distance from coastline. results empirical orthogonal function (EOF) decompositions reveal strong seasonal variability coastal FP maximum (minimum) in astral summer (winter). Wind plays important role driving activities, high accompanied by alongshore wind stress curl. This particularly true during summer, when total transport induced component upwelling-favorable winds curl reaches annual maximum. influenced multiple factors other than forcing, such as orientation coastline, seafloor topography, meandering Brazil Current. As a result, there slight difference between seasonality wind, their relationship was varying spatial locations. impact air-sea interaction further investigated zone, large coupling coefficients found crosswind (downwind) gradients (divergence). analysis leads better understanding dynamics off Brazil, can be understand process at regional level.