SPRINGTIME PHOTOCHEMICAL AIR-POLLUTION IN OSAKA - MODEL ANALYSIS

In the Osaka area, high concentrations of NO2 are observed in spring. To understand the relative roles and amounts of transported background ozone, photochemical ozone, transported NO2, and primary emitted NO2 in controlling NO2 formation in the Osaka area, a three-dimensional ph otochemical air pollution simulation model was applied based on the ac tual meteorological and emission conditions. Simulated results reveal that photochemical reactions play an important role in the formation o f the springtime high concentrations of NO2 in Osaka.