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- Title
Analysis of a Typical Ozone Pollution Process and Causes in Xiamen.
- Authors
ZHUANG Mazhan
- Abstract
Based on the real-time online data of atmospheric super stations and conventional air monitoring stations, the typical ozone pollution process and causes of a typical ozone pollution that occurred in Xiamen on May 13, 2020 was analyzed from the aspects of distribution, photochemical reaction, meteorological conditions and regional transmission of ozone precursors. The results show that the temperature of the polluted day (O3-8 h was 172 µg/m³) was 1~2 ° higher than that of the non-polluted day, the ultraviolet radiation significantly enhanced, the relative humidity reduced by 9%~32%, and the wind speed increased by 1 m/s, which was conducive to the local ozone photochemical generation. During the pollution period, the atmospheric environment VOCs are dominated by alkanes, halogenated hydrocarbons, aldehydes and ketones and aromatic hydrocarbons, indicating the contribution of solvent volatilization, industrial sources and vehicle emission sources. The wind speed and O3 on the non-polluting day and the polluted day were positively correlated, R² were 0.295 and 0.675, respectively; the backward trajectory model and the weather situation analysis show that the diffusion conditions from May 11 to May 12 were poor, and the residual O3 concentration at night was higher, and on the May 13, it was affected by the return of air masses from the Yangtze River Delta region to the coastal area of Fujian after carrying O3 and its precursors into the sea, and the local photochemical formation of ozone was superimposed, resulting in mild ozone pollution exceeding the standard.
- Subjects
XIAMEN Shi (China); FUJIAN Sheng (China); OZONE; ONLINE databases; POLLUTION; AIR masses; HALOCARBONS; TROPOSPHERIC ozone; ATMOSPHERIC ammonia; POLYCYCLIC aromatic hydrocarbons; OZONE layer
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 9, p118
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0710.22.338