Articles | Volume 21, issue 18
https://doi.org/10.5194/acp-21-13973-2021
© Author(s) 2021. 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-21-13973-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Sep 2021
Research article |
| 21 Sep 2021
| 21 Sep 2021
Global tropospheric halogen (Cl, Br, I) chemistry and its impact on oxidants
School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, China
City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
Daniel J. Jacob
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA
William Downs
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA
Shuting Zhai
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China
Viral Shah
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA
Christopher D. Holmes
Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, Florida, USA
Tomás Sherwen
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK
National Centre for Atmospheric Science, University of York, York, UK
Becky Alexander
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
Mathew J. Evans
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK
National Centre for Atmospheric Science, University of York, York, UK
Sebastian D. Eastham
Laboratory for Aviation and the Environment, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
J. Andrew Neuman
NOAA Chemical Sciences Laboratory (CSL), Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
Patrick R. Veres
NOAA Chemical Sciences Laboratory (CSL), Boulder, Colorado, USA
Theodore K. Koenig
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
Department of Chemistry, University of Colorado, Boulder, Colorado, USA
Rainer Volkamer
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
Department of Chemistry, University of Colorado, Boulder, Colorado, USA
L. Gregory Huey
School of Earth and Atmospheric Science, Georgia Institute of Technology, Atlanta, Georgia, USA
Thomas J. Bannan
School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UK
Carl J. Percival
School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UK
now at: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
Ben H. Lee
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
Joel A. Thornton
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
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Latest update: 17 Nov 2025
Short summary
Halogen radicals have a broad range of implications for tropospheric chemistry, air quality, and climate. We present a new mechanistic description and comprehensive simulation of tropospheric halogens in a global 3-D model and compare the model results with surface and aircraft measurements. We find that halogen chemistry decreases the global tropospheric burden of ozone by 11 %, NOx by 6 %, and OH by 4 %.
Halogen radicals have a broad range of implications for tropospheric chemistry, air quality, and...
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