Analysis of summer ozone pollution characteristics and the influence of meteorological factors in Xuchang City
Based on the hourly O3 concentration and meteorological data during the summer(May to September)from 2019 to 2022,the features of O3 concentration and influence of methodological factors were analyzed.Additionally,the transportation and potential sources of O3 pollution in Xuchang City were also clarified.The results showed that the O3 concentrations in summer were generally decilining,but slightly increased in 2022.O3 pollution was heaviest in June with a average daily exceedance rate of 61％.The diurnal variation of O3 concentration showed a single peak,which happened at approximately 16:00.O3 concentration had a negative correlation with relative humidity but a positive correlation with temperature and wind speed.The hourly concentration of O3 was easily exceed the standard when the temperature≥ 35 ℃,relative humidity ranged 20％-＜40％,wind speed between 2-＜3 m/s and the wind direction was south and southeast.In the June,high temperature(≥30 ℃)and low humidity(20％-＜40％)were important factors leading to high O3 concentration.In the summer of 2022,the air mass mainly comes from the northeast,southwest and southeast.In addition to the local formation,the high concentration of O3 in Xuchang City was also influenced by the transmission of other cities,including Henan,Shandong,Anhui,Hubei and other regions.
万方数据
维普
