Abstract
As an approach to the modeling of formation and diffusion processes of photochemical air pollution, one type of trajectory model has been developed. The cell traveling along the trajectory has a three layered structure with an upper limit at 500 m height. The chemical and photochemical reactions in each layer and the vertical eddy diffusions through every interface and the top boundary are calculated during the travel.
Some parameters, such as vertical diffusion coefficient, background concentration of hydrocarbon and deposition velocity of ozone, were evaluated by test simulations using actual emission and meteorological data on an industriai area facing an inland sea.
A synthetic simulation with the optimum values for the examined parameters have given a diurnal variation of ozone concentration which coincides fairly well with the observed pattern.
