Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 19
Articles | Volume 26, issue 19
https://doi.org/10.5194/acp-26-13767-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-13767-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 19
Research article
 | 
01 Oct 2026
Research article |  | 01 Oct 2026

Tropospheric OH and its trends: new insight into atmospheric processes and implications for methane lifetime

Xuewei Hou, Ryan Hossaini, Oliver Wild, Andrea Mazzeo, Richard J. Pope, Ye Wang, Siyuan Wang, Yuanhong Zhao, James Lee, Bin Zhu, Tianliang Zhao, and Alok K. Pandey

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Short summary
The atmosphere’s ability to remove pollutants and greenhouse gases is largely controlled by the hydroxyl radical, but the causes of its long-term changes remain uncertain. Using a global atmospheric model, we quantified the effects of emissions, weather, and key chemical processes on hydroxyl radical levels between 2000 and 2017. Our findings improve understanding of atmospheric self-cleansing and help reduce uncertainties in future climate assessments.
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