新冠疫情期间城市空气质量状况分析

Analysis of Urban Air Qualityduring COVID-19 Outbreak

以2020年1月24日~3月31日城市SO_(2)、NO_(2)、CO、O_(3)、PM_(2.5)和PM_(10)监测数据为基础进行分析,结果表明:新冠疫情期间株洲市空气质量优良率达到95.6%,较2019年同期提高13.5%;除臭氧外,其它污染物质量浓度明显降低;前期日均质量浓度变化更为明显,PM_(2.5)、PM_(10)和NO_(2)较2019年同期下降超过50%;农历新年空气质量优良率达到100%。同时对污染物在防控措施下的响应情况、力度及原因等进行了探讨。

The monitoring data of SO_(2),NO_(2),CO,O_(3),PM_(2.5) and PM_(10) were analyzed from January 24 to March 31in 2020.The results showed that the qualified rate of air quality in Zhuzhou reached 95.6%during COVID-19 outbreak,being 13.5%higher than the same period last year.Except for O_(3),the concentration of pollutants was significantly reduced.The average daily mass concentration during the previous periodchanged more obviously,and PM_(2.5),PM_(10) and NO_(2) declined more than 50%compared with the same period last year.The control rate of air quality in Lunar New Yearreached 100%.At the same time,the response,strength and reasons of pollutants under the prevention and control measures were discussed.