Abstract：Based on the air pollution and meteorological observation data of 13cities in Jiangsu Province from 2013 to 2020, the distribution characteristics of PM2.5-O3 compound air pollutants and their relationship with meteorological conditions were analyzed. The results showed that the occurrence frequency of compound pollutants in Jiangsu were mainly composed of light pollution combinations, with more in the south, especially in the southeast. The compound air pollutants mainly appeared from April to October, with the highest concentration from afternoon to evening, and the average concentration of ozone during this period was higher than that of single ozone pollution; The average compound pollution days account for 15.7% of high ozone days, which was as high as 65.8% in 2014 and has significantly decreased since 2015. There was a positive correlation between PM2.5 and ozone concentrations in the warm season ozone pollution period, and a weak or negative correlation in the PM2.5 pollution period. The air temperature, relative humidity, wind speed and inversion conditions during the compound air pollution period are between single ozone pollution and PM2.5 pollution, mostly of them are below 4m/s and in the ENE-S wind direction range. Compared with the single ozone pollution, air temperature and wind speed are slightly lower, while relative humidity and inversion intensity are slightly higher during the compound air pollution. The main surface situations of compound pollution are the uniform pressure field and the front of low pressure (bottom), followed by the rear of high pressure into the sea and the bottom of high pressure. Through the backward trajectory cluster analysis, it is found that the compound pollution in Huaibei area mainly comes from the southeast coast to the local path, the central and southern cities mainly come from the surrounding areas and the southeast coastal area, and the southeastern cities mainly come from the short-distance transport and the Jiangsu-Anhui-Zhejiang border area.
严文莲, 刘端阳, 王磊, 李聪. 江苏PM2.5-O3复合污染特征及气象条件分析[J]. 中国环境科学, 2023, 43(10): 5098-5106.
YAN Wen-lian, LIU Duan-yang, WANG Lei, LI Cong. Analysis of characteristics and meteorological conditions of PM2.5-O3 compound pollution in Jiangsu province. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5098-5106.
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