SIMULATION OF TRAFFIC-INDUCED AIR-POLLUTION FOR MESOSCALE APPLICATIONS

Recent investigations have shown that vehicular traffic is the main so urce for emissions leading to summer smog. A study of the impact of tr affic emission on urban air quality requires a complex air-pollution s imulation system. This paper presents results of the development and a pplication of an air-pollution simulation system at GMD FIRST which ai ms at supporting users in government administration and industry with forecasting and operative decision-making as well as short- to long-te rm regional planning. The components of the simulation system are para llelly implemented simulation models for meteorology, transport and ai r chemistry, data bases for model input and simulation results, as wel l as a graphic user interface for spatial data visualization. In order to study the influence of traffic emissions, a traffic-flow and a tra ffic-emission model have been added to the simulation system. Results presented are from two recent applications in the regions of Berlin/Br andenburg and Munich (Germany). Further applications are in preparatio n.