5.4 Regional Coverage Modelling of Marine Aerosols Concentration in French Mediterranean Coastal Area

摘要

The present study focuses on the extension of the predictions of the Mediterranean coastal aerosol model (based on the Navy Aerosol Model) to a regional scale, using a mesoscale meteorological model to better take into account the details of the topography and shoreline of the coast for calculations of the wind field and the fetch. The aerosol and the meteorological models are coupled and the spatial variation of the aerosol size distributions is determined in the whole study area. The results show a non-homogeneous spatial coverage of the aerosol concentrations over the northern Mediterranean, with wake due to the shoreline for a continental wind. Another dataset recorded in the Mediterranean in 1995 is used to validate the coupling for steady conditions. The results are found in correct agreement. A discussion is then held about the influence of unsteady conditions on the aerosol concentration is coastal zone.