Spatial and Temporal Variation Analysis of Air Pollution in Taiyuan from 2017 to 2021
Based on the daily air quality monitoring data of Taiyuan city from 2017 to 2021 and meteorologi-cal data of meteorological stations in 2021,the spatial and temporal variation trend of atmospheric pollutant con-centration in Taiyuan city was studied by using statistical methods,Kriging interpolation.SPSS 25.0 software was used to analyze the correlation between six main pollutants in the atmosphere and meteorological conditions.The results show that:① The average annual mass concentrations of PM2.5、PM10、NO2、SO2 and CO in Taiyuan showed a decreasing trend from 2017 to 2021;the annual averaged concentration of zone was increasing from 2017 to 2021.In terms of monthly variations,the PM2.5、PM10、NO2、SO2 and CO showed"winter high and sum-mer low"and the O3 showed"summer high and winter low".② There were differences in the spatial distribution of different pollutants.The spatial distribution pattern of PM10、PM2.5 and SO2 were always"south high north low".The spatial distribution pattern of CO was"east high west low".The spatial distribution pattern of NO2 was"south high north low,east high west low".The spatial distribution pattern of O3had little change,and in general,it spread from the middle to the periphery.③ Correlation analysis showed that SO2、NO2、PM10、PM2.5 and CO were significantly positive correlation,while O3 was correlated with the other five pollutants.Air temper-ature,humidity,rainfall and air pressure were significant meteorological factors affecting the concentration of pol-lutants,which had a great impact on the air pollutions in Taiyuan.④ PSCF and CWT studies showed the poten-tial source areas and contributions of PM10 pollution were mainly distributed in Inner Mongolia,Shaanxi and the surrounding regions of Shanxi province,which had a tremendous effect and contribution to the pollution level of PM10 in Taiyuan.
Taiyuanatmospheric pollutantstemporal and spatial changescharacteristic analysis
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