Larger Scale Modelling of Air Pollutant Transport, Transformation and Deposition in Europe

The EURAD model system which has usually been used with relatively coarse resolution (80 × 80 and 50 × 50 km2) can now perform simulations with considerably higher resolution employing the technique of nesting. The model system has been applied to various scientific and practical questions, for instance to the estimation of cross-tropopause ozone fluxes, the assessment of ozone input from free troposphere into the polluted boundary layer and the simulation of VOC/NOx reduction effects. Model improvements and sensitivity studies which have partly been carried out with other EUMAC groups are discussed. Applications of massively parallel processing and data assimilation techniques for air pollution research are addressed.