Abstract
World Meteorological Organisation (WMO). recognising that oil drift has a strong dependence on meteorology, created the Marine Pollution Emergency Response Support System (MPERSS). where Meteo-France is the co-ordinator for the high seas in the area Marine Pollution Incident II (MPIII) and Institute* de Meteorologia (Portugal) is a supporting service. Instituto de Meteorologia has also national responsibilities to agencies fighting marine pollution. Meteo-France developed an oil spill model, called MOTHY. designed to simulate a transport of oil in three dimensions. It consists of a hydroch namic ocean model linked to an oil spill model including shear current, turbulent diffusion and buoyancy. To provide a better marine pollution response near the Portuguese coast. Meteo-France and Instituto de Meteorologia adapted the model to this area, using a thinner space resolution, introducing tidal forcing and geostrophic currents. The atmospheric forcing (wind and sea pressure) is provided with the atmospheric model by European Centre for Medium-Range Weather Forecasts or Action de Recherche Petite Echelle et Grande Echelle (ARPEGE). The model was calibrated for a pollution accident with tanker Cereal at Leixoes oil terminal (northern coast of Portugal) and it was operationally used for the first time in the MAIO99 Exercise.
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