HIGH-RESOLUTION SIMULATIONS OF THE WIND FLOW AND THE OZONE FORMATION DURING THE HEILBRONN OZONE EXPERIMENT

The Heilbronn ozone experiment was performed in the period 23-26 June 1994 in the state of Baden-Wurttemberg, Germany, with the intention to investigate if peak ozone concentrations during summer smog periods m ay be reduced by the aid of short term local scale interventions. Exte nsive meteorological and air quality measurements carried out during t he experiment provide valuable information on the prevailing situation . In addition, high-resolution model simulations with the EUMAC Zoomin g Model (EZM) were performed to complete the picture al areas where no observations were available and to facilitate assessing the effective ness of the emission reduction interventions. The observational data e nable a very detailed evaluation of the simulation results. The result s of both measurements and simulations reveal that the interventions l ead to air quality improvements with regard to the primary pollutant c oncentrations but only to minor changes in peak ozone levels. The main conclusion from the Heilbronn ozone experiment is that concerted larg e-scale interventions to the primary pollutant sources are needed for decisive reductions of peak ozone concentrations in Central Europe. (C ) 1997 Elsevier Science Ltd.