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将区域气候模式(RegCM3)与对流层大气化学模式(TACM)耦合, 建立区域气候化学模拟系统(RegCCMS), 用以模拟研究中国地区黑碳气溶胶的空间分布、第一间接辐射强迫及其气候效应.利用RegCCMS模式对2003年1月和7月进行模拟, 结果表明, 我国黑碳气溶胶主要集中在四川、河北、山东等地, 1月份浓度最高值中心在四川, 达到4 μg·m~(-3);而在7月则出现在华中地区, 高值中心值为3.5 μg·m~(-3).地面浓度的季节差异不是很明显.1月和7月由黑碳气溶胶所造成的第一间接辐射强迫全国平均值分别为-0.389 W·m~(-2)和-1.18 W·m~(-2), 局部地区达到-4～-4.5 W·m~(-2).敏感性试验结果表明, 考虑黑碳气溶胶的第一间接气候效应后, 使得近地面气温下降, 降水减少, 1月变化的平均值分别为-0.025K和-0.0027 mm·d~(-1), 7月变化的平均值分别为-0.16K和-0.095 mm·d~(-1), 在不同季节和地区, 气温和降水的变化存在明显差异.“,”The regional climate model (RegCM3) and a tropospheric atmosphere chemistry model (TACM) was coupled, thus a regional climate chemistry model system (RegCCMS) was constructed, which was applied to investigate the spatial distribution, the indirect radiaitive forcing and the climatic effect of black carbon aerosol over China in January and July 2003. The simulated results show that there is high concentration of black carbon aerosol in Sichuan, Hebei and Shandong Provinces. The maximum value of the concentration reaches to 4 μg·m~(-3) in Sichuan Province in January, and 3.5 μg·m~(-3) in Central China in July, respectively. The average indirect radiative forcing at the tropopause due to black carbon aerosol is -0.389 W·m~(-2) in January and -1.18 W·m~(-2) in July over China, respectively. In some areas, indirect radiative forcing reaches -4～-4.5 W·m~(-2). Sensitivity test shows that the black carbon aerosol makes the surface air temperature drop and precipitation reduce. Mean changes in surface air temperature and precipitation are 0.025K and 0.0027 mm·d~(-1) in January and 0.16K and 0.095 mm·d~(-1) in July, respectively. There are significant differences of the reduction of the surface air temperature and precipitation in different seasons and areas.