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Differential response of various pollutant-meteorology factors on O3 in key regions of China: Based on multiple methods and datasets
Atmospheric Pollution Research ( IF 4.5 ) Pub Date : 2024-02-15 , DOI: 10.1016/j.apr.2024.102086 Xiaoqi Wang , Yiqing Kang , Wenjiao Duan , Ran Xv , Xiaoyu Liu , Wei Wei , Shuiyuan Cheng
Atmospheric Pollution Research ( IF 4.5 ) Pub Date : 2024-02-15 , DOI: 10.1016/j.apr.2024.102086 Xiaoqi Wang , Yiqing Kang , Wenjiao Duan , Ran Xv , Xiaoyu Liu , Wei Wei , Shuiyuan Cheng
Scientific control is urgently required to address O pollution in key regions of China. Therefore, based on air pollutant concentrations and meteorological datasets, the methods including distributed lag nonlinear models, Kolmogorov–Zurbenko filter and stepwise multiple linear regression (SMLR) were applied to analyze and clarify the response of pollution and meteorological factors to O, as well as the comprehensive impact under different time dimensions in Beijing-Tianjin-Hebei (BTH), Yangtze River Delta (YRD) and Chengdu-Chongqing regions (CY). Results indicate O concentrations in the study area fluctuated at high pollution levels. The effects of various air pollutants and meteorological factors on O varied among cities. Temperature is the dominant driver for O, followed by solar radiation and relative humidity. The influence of wind vector indicates different transport sources of O and its precursors. Direct photochemical process based on SMLR fitting coefficient calculation is the main pathway for O generation, with contribution of 68.7%–93.8%. In terms of air-pollutant factors, U-shaped response between PM and O in all cities highlighted the interaction of the two air pollutants. The undeniable impact of NO on O is reflected in its range of effect. Meteorological adjustments led to −10.4–15.1 μg/m variations on O during 2014–2021, but performed obvious spatiotemporal differences. The changes in anthropogenic emissions deteriorated O pollution from 2014 to 2017, while have fluctuated effect since 2018. From the actual cases in special periods, in order to alleviate O pollution, it is necessary to strengthen the understanding of the synergistic contribution of meteorology and anthropogenic emissions.
更新日期：2024-02-15
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