Articles | Volume 20, issue 23
https://doi.org/10.5194/acp-20-14847-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-14847-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Dec 2020
Research article |
| 02 Dec 2020
| 02 Dec 2020
Elevated levels of OH observed in haze events during wintertime in central Beijing
Eloise J. Slater
School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
Lisa K. Whalley
CORRESPONDING AUTHOR
School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
National Centre for Atmospheric Science, University of Leeds, Leeds,
LS2 9JT, UK
Robert Woodward-Massey
School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
now at: College of Environmental Sciences and Engineering, Peking
University, Beijing, 100871, China
Chunxiang Ye
School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
now at: College of Environmental Sciences and Engineering, Peking
University, Beijing, 100871, China
James D. Lee
National Centre for Atmospheric Science, University of York,
Heslington, York, YO10 5DD, UK
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
Freya Squires
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
James R. Hopkins
National Centre for Atmospheric Science, University of York,
Heslington, York, YO10 5DD, UK
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
Rachel E. Dunmore
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
Marvin Shaw
National Centre for Atmospheric Science, University of York,
Heslington, York, YO10 5DD, UK
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
Jacqueline F. Hamilton
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
Alastair C. Lewis
National Centre for Atmospheric Science, University of York,
Heslington, York, YO10 5DD, UK
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry,
University of York, Heslington, York, YO10 5DD, UK
Leigh R. Crilley
School of Geography, Earth and Environmental Sciences, University of
Birmingham, B15 2TT, Birmingham, UK
now at: Department of Chemistry, Faculty of Science, York University,
4700 Keele Street, Toronto ON, M3J 1P3, Canada
Louisa Kramer
School of Geography, Earth and Environmental Sciences, University of
Birmingham, B15 2TT, Birmingham, UK
William Bloss
School of Geography, Earth and Environmental Sciences, University of
Birmingham, B15 2TT, Birmingham, UK
School of Geography, Earth and Environmental Sciences, University of
Birmingham, B15 2TT, Birmingham, UK
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese
Academy of Sciences, 40 Huayanli, Chaoyang District, Beijing 100029, China
Weiqi Xu
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese
Academy of Sciences, 40 Huayanli, Chaoyang District, Beijing 100029, China
Siyao Yue
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese
Academy of Sciences, 40 Huayanli, Chaoyang District, Beijing 100029, China
Lujie Ren
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese
Academy of Sciences, 40 Huayanli, Chaoyang District, Beijing 100029, China
W. Joe F. Acton
Lancaster Environment Centre, Lancaster University, Lancaster, LA1
4YW, UK
C. Nicholas Hewitt
Lancaster Environment Centre, Lancaster University, Lancaster, LA1
4YW, UK
Xinming Wang
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences,
511 Kehua Street, Wushan, Tianhe District, Guangzhou, GD 510640, China
Pingqing Fu
Institute of Surface-Earth System Science, Tianjin University,
Tianjin 300072, China
School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
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Latest update: 05 Dec 2025
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.
The paper details atmospheric chemistry in a megacity (Beijing), focussing on radicals which...
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