Comparative analysis of the relationship between PM2.5 and O3 in plain and mountainous cities in North China
LUO Yue-han1, ZHAO Tian-liang1, MENG Kai2, WANG Hong3, GONG Kang-jia4, XIN Yu-shan1, LU Shuo1
1. Key Laboratory of Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. Hebei Environmental Meteorological Center, Shijiazhuang 050021, China; 3. Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing 100081, China; 4. School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
Abstract:By using the environmental monitoring data from 2015 to 2019, This study presented a comparative analysis of PM2.5 and O3 changes and their relationships between the plain city Baoding (BD)and the mountainous city Zhangjiakou (ZJK) in North China. In BD, PM2.5 concentrations were low in summer and high in winter, O3 was high in summer and low in winter with a diurnal single-peak in afternoon, while in ZJK, the low PM2.5 concentrations oscillated diurnally with a weaker amplitude. And the wintertime O3 presented the bimodal peak in the afternoon and around 5:00 in the morning. The O3 concentrations in ZJK in winter and during nighttime in spring, summer and autumn were significantly higher than those in BD. Even in summer, nighttime O3 exceeded the air pollution standard, with the highest concentration reaching up to 202μg/m3, reflecting the distinct influence of changes in atmospheric physical and chemical processes in plain cities and clean mountains. PM2.5 and O3 were positively and negatively correlated respectively from April to September and from November to following March; the daily change of the correlation coefficient of PM2.5-O3 in BD is unimodal, and bimodal, each in the early morning and afternoon in ZJK The obvious differences were found in the diurnal and seasonal variations of the relationship between atmospheric compound pollutants PM2.5 and O3 in the plain polluted area and the relative clean mountainous area in North China.
罗悦函, 赵天良, 孟凯, 王宏, 龚康佳, 辛雨珊, 卢硕. 华北平原和山区城市PM2.5和O3变化关系比较分析[J]. 中国环境科学, 2021, 41(9): 3981-3989.
LUO Yue-han, ZHAO Tian-liang, MENG Kai, WANG Hong, GONG Kang-jia, XIN Yu-shan, LU Shuo. Comparative analysis of the relationship between PM2.5 and O3 in plain and mountainous cities in North China. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(9): 3981-3989.
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