中文摘要：

使用一个高分辨率的公用大气环流模式（CAM5.1）研究了我国东部地区人为气溶胶对东亚冬、夏季风的影响。结果表明,人为气溶胶中的黑碳和硫酸盐气溶胶含量的季节性变化在冬、夏季节对大气表现出不同的热力效应,并且可能是影响我国东部地区上空大气温度长期变化的重要因素。人为气溶胶引起的东亚季风区夏季降温可达对流层中高层造成东亚地区海平面气压升高、海陆气压梯度减小,减弱夏季低层的偏南风分量和高层的南亚高压。东亚人为气溶胶可使东亚地区冬季近地面层温度普遍降低、对流层中高层明显增温,导致东亚东部地区海平面气压下降,减弱东亚地区冬季低层的偏北风分量,阻止中层的东亚长波槽南伸,并削弱高层西风急流的强度。

英文摘要：

The effect of anthropogenic aerosols over Eastern China on East Asian monsoons is investigated using a high resolution Community Atmosphere Model Version 5.1（CAM5.1）. Results show that different thermal effect of anthropogenic aerosols is clearly related to seasonal variation of black carbon and sulfate aerosols and it is probably one of the significant factors in impacting long-term change of air temperature over Eastern China. A decrease in air temperature induced by anthropogenic aerosols reaches the middle and upper troposphere over East Asian monsoons region in summer and reduces the differences of surface pressure between land and sea, thus leading to the weakening of south-wind component in lower troposphere and south Asia high in the upper layer. In winter, air temperature decreases near the ground layer but increases remarkably in the middle- and upper-layer, which is opposite to that in summer, weakening the north-wind component in the lower layer, the major East Asian trough in the middle layer and the upper-level westerly jet of East Asian winter monsoon.