Characteristics of Sulphate Aerosol Distribution in China
中国地区硫酸盐气溶胶的分布特征

An eulerian emission/transport/transformation/deposition model is developed, which uses the independent gas phase chemistry submodel to compute transformation rates of SO 2 at various conditions, thus the database of conversion rates is constructed as the input of eulerian model. The processes of aqueous chemistry and wet scavenging are parameterized. Therefore, the model not only considers the nonlinearity of atmospheric chemistry but also has higher efficiency in calculating annual or seasonal averaged concentration of sulphate aerosol.Using the mesoscale model (MM4) and the eulerian model, the characteristics of sulphate aerosol distribution in China was investigated. The results can be easily applied to the climatic model in which the climatic effect of sulphate aerosol is included.