Abstract：A regional climate chemistry model system (RegCCMS) was constructed by coupling the regional climate model (RegCM3) with a tropospheric atmosphere chemistry model (TACM). Then it was used to investigate the influence of the spatial distribution of dust aerosol over China in March, April and May during 2003 to 2007, its associated indirect radiative forcing and the climatic effect. The simulated results show that high concentration of dust aerosol was mainly found in Xinjiang, Inner Mongolia, and Gansu Provinces of northwest China. The concentration increases with the time evolution and reaches to 3500 μg/m3 in May. The monthly averaged indirect radiative forcing at the tropopause due to dust aerosol over China is -1.26 in March, -2.0 in April and -2.69 W/m2 in May. In some regions, a value of -7 W/m2 was simulated. Sensitivity tests showed that the dust aerosol reduces the surface air temperature and precipitation. Mean changes in surface air temperature and precipitation are -0.05K and -0.0037 mm/d in March, -0.07K and -0.037 mm/d in April and -0.08K and -0.1 mm/d in May, respectively. There were significant spatial variations in reductions of surface air temperature and precipitation in the simulations.
沈凡卉, 王体健, 庄炳亮, 李树. 中国沙尘气溶胶的间接辐射强迫与气候效应[J]. 中国环境科学, 2011, 31(7): 1057-1063.
SHEN Fan-Hui, WANG Ti-Jian, ZHUANG Bing-Liang, LI Shu. The first indirect radiative forcing of dust aerosol and its effect on regional climate in China. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(7): 1057-1063.
