摘要
本文提出一个区域的欧拉酸雨模式,包括了大气中污染物质的输送、扩散、非线性化学转化和干湿沉降等物理和化学过程.气相化学反应有18种化学物质,包含了二氧化硫气相氧化的主要化学方程.液相氧化反应包含了H_2O_2,O_3及催化剂对二氧化硫的氧化过程.水平方向有35×35个网格点,垂直方向分15层.选用了四川、贵州地区1988年的8次降水过程对模式作了检验,结果证明模式能较好地模拟这个地区的二氧化硫、硫酸根及降水pH的分布状况.
In the present study, a Eulerian regional acid deposition model is designed. The main atmospheric processes, including transport, diffusion, chemical transformation, dry and wet deposition, are incorporated. A gas phase chemical reaction mechanism for 18 species is used, which includes the important chemical reaction equations related to oxidation of SO2. The heterogeneous oxidation processes of SO2 by H2O2, O3 and metal catalys in the aqueous phase chemistry are considered.In order to test the model,eight cases of precipitation over sichuan - Guizhou area are used.The model subdivides this area into 35×35 grids in horizontal and 15 levels in vertical.The results indicate that the distributions of concentrations for SO2 , SO4 and pH value predicted by the numerical simulations are in agreement with those obtained from the observational data.
出处
《大气科学》
CSCD
北大核心
1993年第6期732-740,共9页
Chinese Journal of Atmospheric Sciences
基金
国家"七五"科技攻关项目"75-58-05-01-02"子专题
关键词
酸沉降
大气物理
大气化学
模式
Acid deposition
Atmospheric physical and chemical processes
Numerical simulation.
