Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 22
Articles | Volume 25, issue 22
https://doi.org/10.5194/acp-25-16331-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-16331-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 22
Measurement report
 | 
20 Nov 2025
Measurement report |  | 20 Nov 2025

Measurement report: Variations and environmental impacts of atmospheric N2O5 concentrations in urban Beijing during the 2022 Winter Olympics

Tiantian Zhang, Peng Zuo, Yi Chen, Tong Liu, Linghan Zeng, Weili Lin, and Chunxiang Ye

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Short summary
During the 2022 Beijing Winter Olympics, we conducted field observations of N2O5. By comparing pre- and post-Olympic pollutant levels, we evaluated the impact of emission reductions on nocturnal chemistry. The results showed that the reactivity of nitric oxide (NO) and volatile organic compounds (VOCs) with NO3 decreased, and that the heterogeneous uptake of N2O5 played a critical role in nocturnal nitrate formation.
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