Research and development within the local air pollution group at NILU. Annual report 1989.

The report summarizes some of the research and devleopment conducted by the local air pollution group at NILU during 1989. A major pa rt of this work was linked to air pollution modelling. Models for various kinds of applications are steadily being improved. New developments were linked to improvements of the description of vertical dispersion, and the improvement of performance through introduction of statistical optimization procedures.