Regional Climate Change Impacts on Air Quality in High Resolution

The coupling of regional climate model and chemistry/aerosol model has been performed recently on the Department of Meteorology and Environmental Protection, Faculty of Mathematics and Physics, Charles University in Prague, for the EC 6FP Project QUANTIFY and finally for EC 6FP Project CECILIA. One objective of the latter, aiming to study climate change impacts in Central and Eastern Europe based on very high resolution simulations using regional climate models (RCM) in 10 km grid, is dealing with climate change impacts on air quality. Chemistry is solved by model CAMx which is coupled to model RegCM As the first step, the distribution of pollutants is simulated off-line for four time slices of 10 years in the model couple. Period of 1991-2000 driven by reanalysis ERA40 is used for validation whereas control run 1991-2000 driven by global model ECHAM5 is used for comparison basis and estimate of systematic error imposed by GCM, future time slices 2041-2050 and 2091-2100 provide the information on climate change impact on future air quality. The comparison to the driving simulations in 50 km resolution shows the benefit of high resolution runs in more detailed description of emissions and surface processes