Influence of meteorological conditions on O3 mass concentration variation in Hefei City
Based on the hourly monitoring data of atmospheric pollutants in Hefei City from 2016 to 2020 and the daily meteorological data of the same period,this paper used Kolmogorov-Zurbenko(KZ)filtering to decompose the O3 mass concentration and daily series of meteorological elements in Hefei City into long-term,seasonal and short-term components,and a meteorological factor regression mod-el was established according to the decomposed mass concentration series.The variation trend of O3 mass concentration and the influence of meteorological conditions on O3 mass concentration in Hefei City were comprehensively evaluated.The results show that seasonal variation is the most important factor that causes the fluctuation of the original sequence of O3 mass concentration.The long-term trend of O3 mass concentration in Hefei City is increasing first and then decreasing.Among the long-term components,relative humidity may be the most important meteorological element that affects O3 mass concentration,and exhibits a significant negative correlation(r=-0.581).Among the original sequence and other components,solar net radiation is the most important factor affecting O3 mass con-centration,with a significant positive correlation(r=0.911).Cluster analysis finds that the average daily maximum temperature and relative humidity corresponding to heavy pollution of O3 are 30.9 ℃ and 71％,respectively.Meteorological conditions promoted O3 pollution before the middle of 2019,with an average increase of 2.19 μg/m3 for ρ(O3),while inhibited O3 pollution after the middle of 2019,with an average decrease of 3.91 μg/m3 for ρ(O3).
Hefei Cityozone(O3)pollutionKolmogorov-Zurbenko(KZ)filteringmeteorological element
NETL
NSTL
万方数据
