Regional modelling of particulate matter with MADE

Describes the development and application of an aerosol model for regional air quality simulations. The aerosol model MADE is based on a modal concept and describes the chemical composition and the size distribution of atmospheric particulate matter. Primary as well as secondary aerosol components are considered in the model, which is fully integrated into the photochemical transport model EURAD. The model system has been applied to a European domain with different resolutions, using a oneway nesting procedure. Simulations show the potential importance of secondary organics of anthropogenic and biogenic origin for the tropospheric particle loading. In addition it is shown that a reduction in precursor emissions for the inorganic ion fraction of PM (sulphate, nitrate and ammonium) does not necessarily lead to an equivalent reduction in PM2.5 mass concentrations, as for example a reduction in sulphate aerosol caused by reduced SO2 emissions might be compensated by enhanced formation of nitrate aerosols in certain regions. The support from the EURAD-group at the University of Cologne is gratefully acknowledged. Part of the work has been performed with sponsorship from the German state of Northrhine Westfalia under contract number IV-A42655.16. n…lndp† ˆ N  2 p ln g exp ÿ 1 2 …lndp ÿ lndpg † ln2 g " #