Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 23
Articles | Volume 25, issue 23
https://doi.org/10.5194/acp-25-18093-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-18093-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 23
Research article
 | 
10 Dec 2025
Research article |  | 10 Dec 2025

Modeling atmospheric sulfate oxidation chemistry via the oxygen isotope anomaly using the Community Multiscale Air Quality Model (CMAQ)

Huan Fang and Wendell Walters

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Short summary
The Sulfur Tracking Mechanism (STM) in Community Multiscale Air Quality Model (CMAQ) was used to model the oxygen isotope anomaly (Δ17O) of aerosol sulfate (ASO4) within the contiguous United States over full annual cycles, for the first time at this spatial and temporal coverage. This approach allows for a qualitative analysis of sulfate (SO42-) formation processes and comparison with corresponding measurements.
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