Exploring influence factors on regional ozone formation for air quality guarantee by analysis on historical monitoring data

Abstract

Abstract Air quality assurance is an essential component of significant events and daily life alike. A comprehensive long-term analysis was carried out based on the observation data of air quality and meteorological elements in Deqing county in 2021, which serves as a sub-venue of 2022 Hangzhou Asian Games during 23, Sep. to 8 Oct. 2023. O3 is the key pollutant that should be take consideration in air quality guarantee for the Asian Games and daily air quality control. O3 exhibited the strongest correlation with RH, followed by Temp and NO2. Extremely high O3 concentration mostly occurred at stricter conditions of high Temp above 30℃, and RH between 30–60%, at the NO2 concentration ranging from 10 to 30 µg·m− 3. The ratio of VOCs and NO2 mostly distributed at 13.0 with an averagely ratio of 28.3. In addition, when NO2 concentration was lower enough, the atmospheric condition belonged to transition zone, while NO2 concentration was higher, the atmospheric condition belonged to NO2-sensitive zone. Historical contemporaneous analysis conducted similar expressions. The results are helpful to supplement and improve the local O3 formation mechanism in the complex environment, and scientifically and effectively guide the rapid, comprehensive and precise control of air pollution for important events.