2019年济宁市春季大气污染物时空分布特征及相关性分析

Correlation Analysis and Spatiotemporal Distribution of Ambient Air Pollutants inJining City during Spring in 2019

为深入了解济宁市春季大气污染程度,对济宁市2019年3月份主要大气污染物(PM10、PM2.5、SO2、NO2、O3、CO)进行了逐小时变化分析。结果表明:PM10、PM2.5、SO2、NO2、CO浓度日变化总体呈晚上高白天低、上午高下午低的态势,O3浓度总体呈白天高晚上低、上午低下午高的态势,昼夜浓度变化都非常大。PM10、SO2、NO2、O3和CO的变异系数在21.1%~30.8%之间,PM2.5的变异系数>40%,表明了除PM2.5外其它指标都相对较稳定。PM10、PM2.5与SO2、O3、CO均存在不同程度的正相关,尤其是PM2.5与O3呈现显著性相关性(P<0.05)。气态污染物之间,O3与SO2存在不同的程度的负相关,O3与NO2存在显著性负相关(P<0.01),这可能是由于O3的生成伴随着NO2的消耗。

An investigation on the spatial and temporal variation and correlation analysis of atmospheric pollutants(SO2,NO2,CO,PM2.5,PM10,O3)during spring in 2019 was done to understand the level of atmospheric pollution in Jining City.The results showed that the concentration of PM10,PM2.5,SO2,NO2,CO in night and morning was higher than in day and afternoon,the concentration of O3 in day and afternoon was higher than in night and morning,all of them changed greatly between night and day.The variable coefficient of PM10,SO2,NO2,O3,CO is from 21.1%to 30.8%,the variable coefficient of PM2.5 is>40%,so they are stable except PM2.5.PM2.5 and PM10 were positively correlated with the gaseous pollutants SO2,O3,CO.PM2.5 was positively correlated with O3(P<0.05).O3 was negative correlated with SO2.O3 was negative correlated with NO2(P<0.01).This may be because the production of O3 is accompanied by the consumption of NO2.