Abstract:The methods of Partitioning Around Medoids (PAM) clustering, Kolmogorov-Zurbenko (KZ) filtering and Generalized Additive Models (GAM) were used to explore the variability and driving factors of O3 concentration changes at various time scales and regions from 2015 to 2022 in Guangdong Province. The results were as follows: (1) Significant regional features of near-surface O3 across administrative divisions in Guangdong province were found, and 8subregions could be identified through O3 data clustering analysis. (2) The short-term component contributed the most to the total variance, followed by the seasonal component after the separation of the O3 concentration time series. (3) The correlation between meteorological variables and O3 concentration variation was influenced by both temporal scales and regional characteristics. (4) The peak concentration of O3 after meteorological adjustment mostly presented a declining trend after 2016 or 2017. The Pearl River Delta region was identified as a prominent area for O3 pollution, jointly caused by adverse meteorological conditions and anthropogenic emissions. (5) Whilst anthropogenic emissions were the main contributors to O3 concentrations, the long-term component of the O3 concentration time series generally exhibited a fluctuating upward trend, and meteorological conditions were the main drivers of O3. These findings suggest that appropriate O3 pollution prevention and control work needs to be tailored to specific times and locations, and the development of precursor reduction plans based on meteorological conditions is important in O3 pollution management.
余锐, 步巧利, 陈辰, 麦博儒, 孙丽颖, 江铭诺, 邓若钊, 查进林, 符传博. 多尺度视角下广东臭氧时空分异特征及驱动因素[J]. 中国环境科学, 2024, 44(7): 3601-3614.
YU Rui, BU Qiao-li, CHEN Chen, MAI Bo-ru, SUN Li-ying, JIANG Ming-nuo, DENG Ruo-zhao, ZHA Jin-lin, FU Chuan-bo. Spatiotemporal variation characteristics and driving factors of near-surface ozone in Guangdong province from a multi-scale perspective. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(7): 3601-3614.
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