Analysis of Air Quality Characteristics and Meteorological Factors in Hulunbuir City
Based on the historical monitoring data of air pollutants in Hulunbuir from 2015 to 2022,this paper ana-lyzed the distribution characteristics of six pollutants and air quality index(AQI)in Hulunbuir and their relation-ship with meteorological factors by using Pearson correlation analysis method.The results showed that:① The o-verall air quality in Hulunbuir from 2015 to 2022 showed an improving trend.Except for the inverted"V"type trend of O3-8h concentration,the concentrations of PM2.5,PM10,SO2,NO2,CO and other pollutants decreased year by year and tended to be stable.PM2.5 and PM10 were the main pollutants throughout the year,and their seasonal variation characteristics of PM2.5,PM10,SO2,NO2 and CO were the highest in winter,with most of the overall winter＞spring＞autumn＞summer,while the O3-8h concentration was relatively high in spring and summer.② Except for 2015-2016,the AQI value of Hulunbuir was significantly lower than the first level limit in other years,and the air quality was in good condition all year round.③ On the annual and seasonal scales,AQI and PM2.5 and PM10 concentrations showed a strong and significant positive correlation.AQI and air pollutant O3-8h showed a negative correlation in autumn and winter.In addition,AQI and SO2,NO2,CO and other pollutant con-centrations showed a significant positive correlation in winter than in other seasons.④ Different meteorological factors have different influences on PM2.5 concentration in Hulunbuir.Temperature is the main factor affecting PM2.5 concentration in Hulunbuir,which is negatively linearly correlated with PM2.5.Precipitation,wind speed and sunshine are also negatively correlated with PM2.5 concentration.Humidity and air pressure are positively correla-ted with PM2.5 concentration,but relative to temperature,the correlation is lower.The relationship between PM10 concentration and meteorological factors is not significant.
air qualitypollutantsAQImeteorological factorsHulunbuir
NETL
NSTL
万方数据
