Articles | Volume 20, issue 23
Atmos. Chem. Phys., 20, 14847–14871, 2020
https://doi.org/10.5194/acp-20-14847-2020

Special issue: In-depth study of air pollution sources and processes within...

Atmos. Chem. Phys., 20, 14847–14871, 2020
https://doi.org/10.5194/acp-20-14847-2020

Research article 02 Dec 2020

Research article | 02 Dec 2020

Elevated levels of OH observed in haze events during wintertime in central Beijing

Eloise J. Slater et al.

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Latest update: 11 May 2021
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Short summary
The paper details atmospheric chemistry in a megacity (Beijing), focussing on radicals which mediate the formation of secondary pollutants such as ozone and particles. Highly polluted conditions were experienced, including the highest ever levels of nitric oxide (NO), with simultaneous radical measurements. Radical concentrations were large during "haze" events, demonstrating active photochemistry. Modelling showed that our understanding of the chemistry at high NOx levels is incomplete.
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