Diurnal and inter-annual variability of surface ozone in Baicheng region, China

Abstract

With the rapid development of industry and economy, the problem of ozone (O 3) pollution in China is of increasing concern in recent years. The problem of ozone pollution has become worse in Baicheng City which belongs to the province of Jilin. We analyze the spatial and temporal distribution of surface ozone and its correlation with precursors and meteorological factors during 2015 and 2019 using data from the automatic Atmospheric Environmental Quality Monitoring Station located in Baicheng. Results showed that the daily and monthly mean values of O 3 concentration were both single-peak patterns, and interannual variation presented a inverted 'V' pattern in Baicheng. The high concentration of O 3 in a year generally occurs from May to July, with the highest daily concentration occurring in the afternoon. The total number of days with O 3 concentration exceeding the limits was 35 days from 2015 to 2019, among which the number of days exceeding the maximal daily average eight-hour (MDA8) O 3 of 100 lg/m 3 was the highest in 2018, and the 90th percentile MDA8 showed an overall growth pattern. Seasonal variations in O 3 concentration in 2018 and 2019 were not consistent with the three previous years.

Analysis of Air Quality Changes and Influencing Factors in Changchun during the COVID-19 Pandemic in 2020

“…This is due to the fact that O3 concentrations are higher in spring than in winter, even without the effect of lockdown, when temperatures are higher and solar radiation is stronger, and VOCs and NOx formed from vehicle exhaust catalyze ozone production with the combined effect of high temperatures as well as light radiation. A positive correlation between O3 concentration and temperature was also found in the results of other scholars' studies on cities in northeastern China and other countries, indicating that higher temperatures are conducive to the formation of O3 (Allu et al, 2020;Choi and Souri, 2015;Qin et al, 2021).…”