A Modeling Study on the Climatic Effects of Aerosols in China
A coupled modeling system (RegCCMS) which consists of a regional climate model (RegCM3) and a tropospheric atmosphere chemistry model (TACM) is applied to investigate the distribution, radiaitive forcing as well as the climatic effects of aerosols in China. In this study, parameterizations for cloud droplet number concentration and precipitation autoconversion rate are introduced into RegCCMS to investigate the indirect effect of aerosols. Modeling results show that sulfate, nitrate, BC and OC aerosols are mainly distributed in East and North China as well as Sichuan basin because of industrial distribution and terrain, while dust is mainly distributed in Northwest China. Annual averages of direct, indirect and total radiative forcing of aerosols at the top of atmosphere are -2.77 W/m2, -2.42 W/m2 and -4.43 W/m2, respectively. Indirect radiative forcing is close to direct radiative forcing and can not be ignored. Owing to the total effects of aerosols, the countrywide annual average changes of surface air temperature and precipitation are -0.59K and -0.31 mm/d, respectively, showing significant differences in seasons and regions.
Aerosol Climatic effects Radiaitive forcing China
Shu Li Tijian Wang Bingliang Zhuang Fanhui Shen
School of Atmospheric Science,Nanjing University,Nanjing 210093,China
国际会议
西安
英文
296-301
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）