A NUMERICAL STUDY ON TROPOSPHERIC OZONE OVER CHINA

A three-dimensional Eulerian model for regional tropospheric ozone sim ulation was developed. It includes transport, photochemical reactions, effects of cloud on ozone, pollutant emissions and depositions. Consi dering the factors that affect ozone photochemical transformation and some typical characteristics of air photochemical pollution in China, ozone photochemical transformation rate was used to avoid the huge amo unt of numerical calculation of chemical dynamic equations. Compared w ith averaged ozone observation data, simulation of effect of cloud on ozone was studied and the ozone consuming rate by cloud is specified b y numerical test. Through numerical simulation, yearly-averaged distri bution of tropospheric ozone (especially surface ozone) over China, it s seasonal changes, and some distribution features of urban photochemi cal pollution in China were studied. Copyright (C) 1996 Elsevier Scien ce Ltd