Spatial differentiation and driving factors of aerosol optical depth in Sichuan Basin from 2003 to 2018
WANG An-yi1, KANG Ping1, ZHANG Yang2, ZENG Sheng-lan1, ZHANG Xiao-ling1, SHI Juan3, LIU Zhi-hong2, XIANG Wei-guo1, WANG Ke-ke1, ZHANG Song-yu1, LU Jun-cen1
1. Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China; 2. College of Resource and Environment, Chengdu University of Information Technology, Chengdu 610225, China; 3. Chengdu Meteorological Bureau, Chengdu 610072, China
Abstract：In order to reveal the spatial distribution of aerosol optical depth (AOD) in Sichuan Basin and quantitatively evaluate the driving factors that affect its temporal and spatial differentiation, the geostatistical methods such as Mann-Kendall mutation test, spatial auto-correlation, spatial hot spot detection and geographical detector were used to analyze the data of MODIS aerosol products from 2003 to 2018. There was an overall decreased trend of AOD in Sichuan Basin from 2003 to 2018, and the mutation year was 2015. According to the variation trend, the 16years could be divided into six periods. The characteristics of aerosol regional pollution in Sichuan Basin were obvious. AOD high value areas were mainly concentrated in the middle of the basin, while AOD low value areas were mainly concentrated in the edge of the basin. A significant annual clustering pattern (spatial positive auto-correlation, Moran's I was greater than 0) of the distribution of AOD was showed in Sichuan Basin. The area of the high-high clustering areas had been decreased since 2012, and the variation of the annual clustering areas was consistent with the variation trend of AOD value in different periods. Eight factors were optimized by principal component analysis for geographic detector analysis. And the results showed that the spatial and temporal differentiation of AOD in the basin in the past 16years was mainly caused by the unbalanced development level of urbanization and industrialization. From 2014 to 2015, the driving force of all driving factors decreased 11.2%~59.2% compared with the previous period, which was consistent well with the conclusion that 2015 was a mutation year.
王安怡, 康平, 张洋, 曾胜兰, 张小玲, 施娟, 刘志红, 向卫国, 汪可可, 张松宇, 鲁峻岑. 2003~2018年四川盆地气溶胶光学厚度空间分异及驱动因子[J]. 中国环境科学, 2022, 42(2): 528-538.
WANG An-yi, KANG Ping, ZHANG Yang, ZENG Sheng-lan, ZHANG Xiao-ling, SHI Juan, LIU Zhi-hong, XIANG Wei-guo, WANG Ke-ke, ZHANG Song-yu, LU Jun-cen. Spatial differentiation and driving factors of aerosol optical depth in Sichuan Basin from 2003 to 2018. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(2): 528-538.
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