Long-range transmission of pollutants simulated by a two-dimensional pseudospectral dispersion model

Abstract

The pseudospectral dispersion model is adapted for simulation of the long-range transmission of sulphur pollutants in the European region, covering an area of about 4000 km multiplied by 4000 km. Regional ″background″ concentrations of sulphur oxides are found to be highly dependent on episodes. The simulation is based on emission data, given in squares of about 50 km multiplied by 50 km and on synoptic wind fields derived from observed wind velocities of the 850 mb level and the surface level. This study is the first application of the pseudospectral dispersion model which compares computed concentrations with measured field data. The model has possible applications as a tool for assessment of the impact of both national and international emission regulation strategies.