Model Simulations of the Ozone Concentrations over Europe during the Summer 2003 Heat Wave

An intercomparison between meteorological drivers and chemical mechanisms is performed on some days of the Heat Wave event of 2002. The models used are BOLCHEM and CHIMERE, and their results are compared with ground-based concentrations. Both the models reproduce the pollution event. How-ever, dierent chemical mechanisms and parameterisations produce larger dierences on the chemical concentrations than variations due to meteoro-logical elds.