Based on the hourly surface ozone (O
3) observations and meteorological data from Zhuzhou in 2021, the pollution characteristics and influencing factors of O
3 in Zhuzhou were investigated in the study. In addition, the Potential Source Contribution Function (PSCF) and Concentration
[...] Read more.
Based on the hourly surface ozone (O
3) observations and meteorological data from Zhuzhou in 2021, the pollution characteristics and influencing factors of O
3 in Zhuzhou were investigated in the study. In addition, the Potential Source Contribution Function (PSCF) and Concentration Weighted Trajectory (CWT) analysis methods were employed to analyze the transmission paths and potential pollution sources of O
3 pollution in Zhuzhou. The results showed that the total number of days with O
3 exceeding the standard at all monitoring stations in Zhuzhou was 142 days in 2021. The overall air quality was less affected by SO
2, NO
2, and CO, and the trend of O
3 pollution was still increasing. The concentrations of O
3, CO, and NO
2 varied significantly in different months, and the variation of O
3 exhibited a “double-peak” pattern, with the peak value occurring in September. The O
3 concentration in urban areas was significantly higher than that in suburban areas. Meteorological conditions had a significant impact on the degree of O
3 pollution in Zhuzhou. The average wind speed in Zhuzhou throughout the year was 1.7 m/s, and the prevailing wind direction in summer was southeast, with a frequency of 16%. O
3 pollution was mainly transported by short-distance airflow during the over-standard periods in 2021, accounting for 37.64%. The main source of O
3 pollutant was from Jiangxi Province in the east, with the shortest distance of regional transport and the highest O
3 concentration. In addition, transportation from central Guangdong Province, western Jiangxi Province, and central Hubei Province also had a significant impact.
Full article