Chengdu is a typical basin city of Southwest China with rare observations of remote sensing measurements. To assess the climate change and establish a region aerosol model, a deeper understanding of the separated volume size distribution (VSD) and complex refractive index (CRI) is required. In this study, we employed the sub-mode VSD and CRI in Chengdu based on the three years observation data to investigate the sub-mode characteristics and climate effects. The annual average fraction of the fine-mode aerosol optical depth (AOD(f)) is 92%, which has the same monthly tendency as the total AOD. But the coarse-mode aerosol optical depth (AOD(c)) has little variation in different months. There are four distinguishing modes of VSD in Chengdu; the median radii are 0.17 m +/- 0.05, 0.31 m +/- 0.12, 1.62 m +/- 0.45, 3.25 m +/- 0.99, respectively. The multi-year average and seasonal variations of fine- and coarse-mode VSD and CRI are also analyzed to characterize aerosols over this region. The fine-mode single scattering albedos (SSAs) are higher than the coarse-mode ones, which suggests that the coarse-mode aerosols have a stronger absorbing effect on solar light than the small-size aerosol particles in Chengdu.
1.Chinese Acad Sci, State Environm Protect Key Lab Satellite Remote S, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chengdu Univ Informat Technol, Coll Resources & Environm, Chengdu 610103, Sichuan, Peoples R China
Recommended Citation:
Zhang, Chi,Zhang, Ying,Li, Zhengqiang,et al. Sub-Mode Aerosol Volume Size Distribution and Complex Refractive Index from the Three-Year Ground-Based Measurements in Chengdu China[J]. ATMOSPHERE,2019-01-01,10(2)