中文摘要：

该工作利用区域模式（WRF），对我国东部三大城市群区域的气溶胶活化颗粒物浓度增加的气候效应进行了模拟研究。结果表明：增加气溶胶活化颗粒物后，我国东部许多地区的地表感热、潜热通量减少，华东大部分地区的地表2m气温降低；降水对气溶胶活化颗粒物浓度增加的响应较为复杂，缺乏一致的规律性，但增加活化颗粒物后，我国东部许多地区的降水明显减少；由气溶胶活化颗粒物浓度变化造成的大气水汽输送和水汽含量的变化，是气溶胶间接效应影响东亚夏季风降水的主要原因。从总体上来说，中国不同地区的气溶胶活化颗粒物浓度增加，使得中国东部大部分地区的低层气温降低、大气湿度降低、降水减少，呈现出干冷化的趋势。

英文摘要：

Weather Research and Forecasting （WRF ）model coupled with Morrison’s double-moment bulk microphysical scheme is used to simulate the climate effect of increasing aerosol in three mega city agglomeration. The results show that while increasing concentrations of aerosol particles,sensitive and latent heat at land surface decrease over most eastern China area,at the same time,temperature at 2 m decreases as well in most of east China. As far as concentrations of aerosol particles increased,the response relationship between concentration of aerosol particles and precipitation is complex,lacking identical regularity,but precipitation decreases over most of eastern China area.The increase of aerosol particles concentration lead to atmospheric water vapor transportation changes, which is the main reason of aerosol indirect effect on east Asian summer monsoon precipitation changes.On the other hand,vertical circulation change is the subsidiary factor to lead the east Asian summer monsoon precipitation change.In short,increase in aerosol concentrations lead to reduced precipitation,decreased atmospheric humidity and temperature in the lower atmosphere over most of eastern China,showing a dry and cold climatic trends.