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Variation characteristics of air combined pollution in Beijing City
Xiaoyan Wu, Jinyuan Xin, Wenyu Zhang, Wenkang Gao, ... Lili Wang
2022-04-13
发表期刊Atmospheric Research
出版年2022
英文摘要

With a decrease in fine particulate matter (PM2.5) due to the implementation of air pollution prevention-control measures, ozone (O3) has risen in China especially in urban areas recently. It becomes more and more important to control air combined pollution with high concentration of PM2.5 and O3. We analyzed the characteristics of air combined pollution in Beijing from 2014 to 2019 in this paper. Results indicated that the trough O3 showed an upward trend of 4.5 μg m−3 yr−1, while the peak decreased by −1.1 μg m−3 yr−1. There were three typical atmospheric chemical stages in the interaction between O3 and PM2.5 in summer through observations. The first was an intense photochemical stage with the synchronous and rapid growth of O3 and PM2.5. The O3 concentration varied from 68 μg m−3 to 206 μg m−3 when PM2.5 ≤ 35 μg m−3. While secondary inorganic ions (SNA) ranged from 2 to 21 μg m−3 especially SO42− (0.8–12 μg m−3). The second was an aerosol chemical generation stage with the rapid increase of PM2.5 and SNA under high O3 concentration. O3 was maintained at a high concentration between 198 μg m−3 and 241 μg m−3 when PM2.5 was within the range of 35–125 μg m−3. SNA increased from 12 μg m−3 to 96 μg m−3. The third was a high PM2.5 pollution stage suppressing the generation of O3 when PM2.5 ≥ 125 μg m−3. O3 began to decline with the growth of PM2.5 and decreased from 224 μg m−3 to 130 μg m−3. Ultraviolet radiation (UV) decreased from 13 MJ m−3 in the first to 8 MJ m−3 in this stage.

领域地球科学
URL查看原文
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/347900
专题地球科学
推荐引用方式
GB/T 7714
Xiaoyan Wu, Jinyuan Xin, Wenyu Zhang, Wenkang Gao, ... Lili Wang. Variation characteristics of air combined pollution in Beijing City[J]. Atmospheric Research,2022.
APA Xiaoyan Wu, Jinyuan Xin, Wenyu Zhang, Wenkang Gao, ... Lili Wang.(2022).Variation characteristics of air combined pollution in Beijing City.Atmospheric Research.
MLA Xiaoyan Wu, Jinyuan Xin, Wenyu Zhang, Wenkang Gao, ... Lili Wang."Variation characteristics of air combined pollution in Beijing City".Atmospheric Research (2022).
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