中国地区硫酸盐气溶胶的分布特征

建立了一个三维欧拉型排放/输送/转化/沉降模式，其主要特点是采用独立的气相化学子模式计算各种不同条件下SO2的转化速率，建立转化率的数据库，直接为欧拉模式调用，并对液相化学和湿清除过程进行了参数化处理。这样使模式既考虑了大气化学过程的非线性，又具有较高的计算效率，能够方便地计算年（季）尺度的硫酸盐气溶胶SO2-4的浓度分布。利用中尺度气象模式MM4和欧拉输送模式模拟了中国地区硫酸盐气溶胶的时空分布，其结果可以方便地应用到考虑硫酸盐气溶胶气候效应的气候模式中去。

Characteristics of Sulphate Aerosol Distribution in China

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.