中文摘要：

本文采用CAM3.0模式研究东亚地区各种气溶胶浓度增加后对于东亚春季各气候要素,尤其是对降水和春季风场的影响。在模式中通过分别对区域（20～50°N,100～150°E）内黑碳气溶胶浓度单独加倍、硫酸盐气溶胶浓度单独加倍、两种气溶胶浓度同时加倍的实验方法,探讨不同气溶胶浓度变化在东亚春季气候变化中的具体作用。结果表明：在春季,3种气溶胶浓度增加方式都使得东亚地区表现出降水中南部减少北部增加,低层大气西南风异常以及地面温度南部增加北部减少。通过对110～120°E的断面分析发现,硫酸盐与黑碳气溶胶在春季首先影响约800 hPa以上大气的温度并通过不同的动力机制影响东亚地区的风场,风场的改变进而导致了云量和降水在东亚北方地区增多而中南部地区减少,并最终使得地面温度表现出东亚中南部地区增温而北方地区相对降温的特征。

英文摘要：

In this study,we used NCAR CAM3.0 model to study the climate impacts of increasing aerosol concentration on East Asia climate in boreal spring time.We doubled sulfate and black carbon concentration alone and them together in East Asia（20-50 °N,100-150 °E）to investigate the climate effects of these two major aerosol species and competition between them.The results show that in all three scenarios the precipitation increasee in the north China and decreasee in the central-south China with the southwest wind anomaly,with surface cooling in the north China but warming in the south.Analysis of the vertical structure between 110 °E and 120 °E,suggests that the sulfate and black carbon aerosol will induce meridional circulation anomaly through their different dynamic mechanisms,then generate the precipitation and surface temperature pattern mentioned above.