利用包含气溶胶的区域气候模式RegCM3对南亚地区硫酸盐、 黑碳和有机碳三类人为气溶胶排放的时空分布特征进行了数值模拟， 并运用相关性分析和合成分析方法对夏季南亚地区气溶胶浓度与南亚季风降水间的相关关系进行了研究。结果表明， 夏季南亚地区人为气溶胶排放量的增加将同时削弱该地区高层东风急流与低层偏西气流， 南亚夏季风减弱。与此同时， 气溶胶浓度的增长将引起夏季500 hPa位势高度升高， 并使得850 hPa南亚夏季风槽减弱。因此， 夏季南亚地区气溶胶浓度与南亚季风降水间存在着显著的负相关关系， 当夏季南亚地区气溶胶浓度增加时， 南亚夏季风降水将有所减少。
A regional climate model RegCM3 coupled with a chermistry aerosol model is employed to numerically simulate the direct climate effects of the anthropogenic aerosols (sulfate, black carbon and organic carbon) discharging in South Asian summer monsoon. The relationship between aerosol column burden over India and rainfall in South Asia in summer are analyzed using the methods of correlation analysis and synthesis analysis. The result shows that the increasing of anthropogenic aerosol emissions in South Asia in summer will also weaken the upper easterly jet in the region with the low-level westerly flow to lead to South Asian summer monsoon weakened. At the same time, the growth of aerosol column burden will cause 500 hPa geopotential height in summer increased to make 850 hPa South Asia summer monsoon trough weakened. The aerosol column burden in South Asia in summer and precipitation of South Asia monsoon has a significant negative correlation. When the aerosol column burden in South Asia in summer increased, precipitation of South Asian summer monsoon will be reduced.
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