摘要
利用NCAR的新一代GCM CAM3.0模式离线耦合一个气溶胶同化系统,模拟研究了中国区域硫酸盐气溶胶的直接气候效应对东亚夏季风及其降水的影响。结果显示:中国区域硫酸盐气溶胶引起全球平均的直接辐射强迫为-0.25W/m2,中国内陆约25°N以北普遍降温,而海表温度升高。由此导致海陆温差缩小,东亚夏季风强度减弱,中国地区季风降水明显减少,而尤以积云降水减少起主要作用。硫酸盐气溶胶对中国地区的对流活动起抑制作用。
The effects of sulfate aerosols over China on East Asian summer monsoon and precipitation were investigated using the latest version of general circulation model （GCM） CAM3.0 developed by NCAR/UCAR, coupled with an off-line aerosol assimilation system. The model results show that sulfate aerosols over China could bring about an extra global radiative force of 0.25 W/m^2. In most of China （ about the north of 25°N）, the surface temperature universally drops while sea surface temperature increases, which drops the temperature difference between sea and land so that it weakens the East Asian summer monsoon and the precipitation in China. Especially, the cumulus cloud precipitation decreases greatly since sulfate aerosols mainly suppress the convection and cumulus cloud precipitation over China
出处
《气候变化研究进展》
CSCD
2008年第2期111-116,共6页
Climate Change Research
基金
国家重点基础研究发展计划(973计划)项目(2006CB403707)资助
