Measurement report: Anthropogenic activities reduction suppresses HONO formation: direct evidence for secondary pollution control

Zhai, Mingzhu; Tong, Shengrui; Zhang, Wenqian; Zhang, Hailiang; Li, Xin; Wang, Xiaoqi; Ge, Maofa

doi:10.5194/acp-25-16679-2025

Articles | Volume 25, issue 22

https://doi.org/10.5194/acp-25-16679-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-16679-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 22

Measurement report

|

25 Nov 2025

Measurement report |

| 25 Nov 2025

Measurement report: Anthropogenic activities reduction suppresses HONO formation: direct evidence for secondary pollution control

Mingzhu Zhai, Shengrui Tong, Wenqian Zhang, Hailiang Zhang, Xin Li, Xiaoqi Wang, and Maofa Ge

Supplement

https://doi.org/10.5194/acp-25-16679-2025-supplement

Data sets

Measurement report: Anthropogenic activities reduction suppresses HONO formation: Direct evidence for Secondary Pollution control Mingzhu Zhai et al. https://doi.org/10.5281/zenodo.16083849

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Short summary

To explore how anthropogenic activities affect HONO formation, we conducted comprehensive observations in Beijing. During clean periods with a 53 % drop in Traffic Performance Index, HONO, CO, and NO2 levels decreased by 2–3 times compared to polluted periods. Emission reduction simulations showed that a 50 % NO_x reduction could lower HONO by up to 46.3 %, indicating that reducing anthropogenic activities significantly suppresses HONO formation and provides direct evidence for pollution control.