Modelling of ozone in Northrhine-Westphalia. Effects of emission reduction on ozone distribution

To study the efficiency of measures to reduce high ozone concentrations and to optimize abatement strategies, it is necessary to incorporate numerical photochemical model studies. For the simulation of an episode of four days with high concentrations (July 1994), meteorological fields were simulated by the nonhydrostatic mesoscale model METRAS. Chemistry, Transport and Deposition were calculated by RCDM using the RADM2-chemistry. For the simulations detailed emission inventories were provided by the State Environment Agency. Results show the inefficiency of speed limits and the weak effectiveness of regional measures against high ozon concentrations.