Analysis of the Characteristics and Influencing Factors of Air Quality Changes in Chongqing From 2014 to 2022
With the development of urbanization and industrialization,air quality is gradually declining,and air pollution problems are becoming increasingly prominent.This paper selects the air quality index data and concen-tration data of six major pollutants in Chongqing from 2014 to 2022,analyzes the annual,quarterly,and monthly changes and trends during this time period,and studies the correlation between air quality and six pollutants,as well as the primary pollutants.The results indicate that,from 2014 to 2022,the environmental air quality in Chongqing has significantly improved,with an overall excellent air quality index(AQI)rate of 91.23％in 2022;The overall AQI value shows a downward trend.Except for O3,the concentrations of the other five pollutants show a decreasing trend at the seasonal scale.PM2.5,PM10,SO2,CO and NO2 shows a phenomenon of being heavy in winter and light in summer;the concentrations of the O3 is the opposite;On a monthly scale,PM2.5 and PM10 exhibit a U-shaped distribution;O3 shows an inverted U-shaped distribution.The AQI value is significantly pos-itively correlated with PM2.5,PM10 and CO,while negatively correlated with O3,and the correlation is not signifi-cant.The correlation is most significant in summer.In addition,in recent years,ozone has gradually become a key indicator affecting air quality.
air qualitypollutantsfeature analysiscorrelation analysis
NETL
NSTL
万方数据
