1. Sub-Mode Aerosol Volume Size Distribution and Complex Refractive Index from the Three-Year Ground-Based Measurements in Chengdu China.
- Author
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Zhang, Chi, Zhang, Ying, Li, Zhengqiang, Wang, Yongqian, Xu, Hua, Li, Kaitao, Li, Donghui, Xie, Yisong, and Zhang, Yang
- Subjects
ATMOSPHERIC aerosols ,REMOTE sensing ,CLIMATE change ,OPTICAL depth (Astrophysics) ,PARTICULATE matter - Abstract
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 (AODc ) has little variation in different months. There are four distinguishing modes of VSD in Chengdu; the median radii are 0.17 μm ± 0.05, 0.31 μm ± 0.12, 1.62 μm ± 0.45, 3.25 μm ± 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. [ABSTRACT FROM AUTHOR]- Published
- 2019
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