Temporal and Spatial Characteristics of Particulate Matter and Ozone and Their Influencing Factors in Jiaozuo City
The rapid development of our country's economy has brought serious problems of environmental pollu-tion,which hindered the progress of constructing ecological civilization and sustainable development.Particulate matter(PM2.5 and PM10)and ozone are important pollutants in autumn and winter(January-March and October-December)and spring and summer(April-September),respectively,in northern cities in China.In this paper,the temporal and spatial variation characteristics of particulate matter and ozone in Jiaozuo City from 2020 to 2023 were analyzed,and the correlation between the concentrations of particulate matter and ozone in five state-con-trolled monitoring points in Jiaozuo City and the factors of vegetation and buildings in spring and summer in the 300-meter and 600-meter buffer zones was studied.The results showed that:① the concentration of particulate matter in Jiaozuo City decreased slightly in recent four years,but the concentration of ozone had a rebound trend;② The concentration of particulate matter in Jiaozuo City was low in spring and summer and high in autumn and winter.The ozone concentration was high in spring and summer and low in autumn and winter.(3)There is a sig-nificant difference in the concentration of particulate matter or ozone among five state-controlled monitoring points in Jiaozuo City.④ Environmental factors have a significant impact on the concentration of pollutants.In the 600 m buffer zone,there was a significant negative correlation between PM10 concentration and vegetation coverage in spring and summer.There was a significant positive correlation between the concentration of ozone and the area of impervious ground(including main roads,squares and plastic sites).In the 300-meter buffer zone,the concentration of PM10 and PM2.5 showed a significant positive correlation with the sum of the area of low-rise buildings,main roads and squares in autumn and winter.Finally,this paper suggests that the air pollution in urban areas can be reduced by increasing afforestation and reducing impervious ground construction.
particulate matter and ozonetemporal and spatial differencesenvironmental elementsJiaozuo City
NETL
NSTL
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