分析了苏南某地 2022 年大气污染物监测数据.结果表明:某地主要超标污染物为 O3 和 PM2.5,O3 月均值占标率呈双峰变化,其他污染物呈"U"形变化,O3 高值日的 O3 小时浓度在 11:00-19:00均处在较高位,PM2.5 高值日的 PM2.5 小时值全天处于较高水平.各污染物月均值相关性分析,NO2与CO、PM2.5 正相关且相关性较大,O3 与 NO2、CO 负相关,PM2.5 与 NO2、CO 正相关;日均值相关性分析,1-3 月份、11-12 月份,PM2.5 与 PM10 的相关系数在 0.8 以上,4-10 月份,O3 与 PM2.5、PM10的相关性较好.在 O3 和PM2.5 超标的情况下,PM2.5 和 PM10 的相关性较好,O3 和 NO2 呈现出一定的负相关,值得注意的是,在PM2.5 超标的情况下,O3 和 NO2 的相关系数达到了-0.72.
After analyzing the monitoring data of atmospheric pollutants in a certain area of southern Jian-gsu in 2022,it was found that the main pollutants exceeding the standard were O3 and PM2.5.The monthly mean ratio of O3 showed a bimodal change,while other pollutants showed a"U"shaped change.The hourly concentration of O3 on high value days was at a high level from 11 to 19 o'clock,and the hour-ly value of PM2.5 on high value days was at a high level throughout the day.Correlation analysis of monthly mean values of various pollutants shows that NO2 is positively correlated with CO and PM2.5.O3 is negatively correlated with NO2 and CO,while PM2.5 is positively correlated with NO2 and CO;Dai-ly average correlation analysis shows that from January to March and November to December,the corre-lation coefficient between PM2.5 and PM10 is above 0.8.From April to October,O3 has a good correlation with PM2.5 and PM10.In the case of O3 and PM2.5 exceeding the standard,the correlation between PM2.5 and PM10 is good,while O3 and NO2 show a certain negative correlation.It is worth noting that in the case of PM2.5 exceeding the standard,the correlation coefficient between O3 and NO2 reaches-0.72.