Seasonal Cycle of Sea Surface Salinity in the Angola Upwelling System

The seasonal cycle of Sea Surface Salinity (SSS) along the Angolan Coast is investigated using observations and a regional ocean model. model reproduces main characteristic SSS coast, such as freshwater discharge signature off Congo River plume low-salinity observed in February/March October/November coast. also two maxima salinity June/July December/January. analysis salt budget reveals that semi-annual controlled by meridional advection surface water, vertical subsurface water mixing at base mixed layer. Angola Current which brings from offshore region Congolese coast toward south October/November. contribution modulated stratification not velocities peak during upwelling season. due to intrusion creates strong gradient with high subsurface.