Articles | Volume 25, issue 17
https://doi.org/10.5194/acp-25-10293-2025
© Author(s) 2025. 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-25-10293-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Sep 2025
Research article |
| 10 Sep 2025
| 10 Sep 2025
Incorporation of multi-phase halogen chemistry into the Community Multiscale Air Quality (CMAQ) model
Kiyeon Kim
Department of Environment and Energy Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
Chul Han Song
CORRESPONDING AUTHOR
Department of Environment and Energy Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
Kyung Man Han
Department of Environment and Energy Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
Greg Yarwood
Ramboll, Novato, CA 94945, USA
Ross Beardsley
Ramboll, Novato, CA 94945, USA
Saewung Kim
Department of Earth System Science, University of California, Irvine, CA, USA
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Short summary
Despite the crucial role of halogen radicals in the atmosphere, current chemical transport models (CTMs) do not account for multi-phase halogen processes. To address this issue, we incorporated 177 halogen reactions, together with anthropogenic and natural halogen emissions into the CTMs. Our findings reveal that incorporation of these halogen processes significantly improves model performances compared to observations. In addition, we emphasize the influence of halogen radicals on air quality.
Despite the crucial role of halogen radicals in the atmosphere, current chemical transport...
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