2019年太原青运会期间空气质量评估

doi:10.3969/j.issn.1673-503X.2021.06.005

Abstract

Abstract:

To evaluate the impact of air pollution control measures on air quality improvement during the Second National Youth Games held in Taiyuan, we analyzed the evolution of concentrations of six pollutants and the vertical variation of aerosols in three periods (before the games, during the games, and after the games).The results show that compared with the period before the games, the concentrations of PM₁₀, PM_2.5, CO, NO₂, and O₃ during the games decrease by 30.5%, 37.3%, 20.2%, 18.0%, and 18.6%, respectively in Taiyuan, while the reduction of SO₂ is not obvious.In terms of the vertical variation, the peak value of aerosol extinction coefficient decreases by 24.6% during the games on average, decreasing by 46% under low relative humidity (RH < 60%) conditions and 21.6% under high RH (>60%) conditions, respectively.The ratio of PM_2.5 to PM₁₀ decreases during the game and the hygroscopic growth effect of aerosols in the vertical atmosphere is enhanced.Compared with the same period in 2017 and 2018, all the concentrations of PM₁₀, PM_2.5, CO, and NO₂ decrease significantly, while the O₃ concentration exhibits small variation.In conclusion, control measures during the Youth Games can effectively reduce the local particulate matter concentrations.

Key words: Air quality, Vertical distribution of aerosol, Particulate matter

CLC Number:

Wei GUO, Ling-yun ZHU, Wen-ya WANG, Xing-ai GAO, Peng-wei CHENG, Yue-jun ZHANG. Evaluation of air quality improvement in Taiyuan during Second National Youth Games[J]. Journal of Meteorology and Environment, 2021, 37(6): 36-43.

Figures/Tables 7

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Evaluation of air quality improvement in Taiyuan during Second National Youth Games

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