Articles | Volume 25, issue 5
https://doi.org/10.5194/acp-25-3287-2025
© 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-25-3287-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Predicted impacts of heterogeneous chemical pathways on particulate sulfur over Fairbanks (Alaska), the Northern Hemisphere, and the Contiguous United States
Sara L. Farrell
CORRESPONDING AUTHOR
Department of Environmental Sciences and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, USA
Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
Oak Ridge Institute for Science and Education, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
Havala O. T. Pye
Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
Robert Gilliam
Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
George Pouliot
Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
Deanna Huff
Alaska Department of Environmental Conservation, P.O. Box 111800, Juneau, AK 99811-1800, USA
Golam Sarwar
Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
William Vizuete
Department of Environmental Sciences and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, USA
Nicole Briggs
Laboratory Services and Applied Science Division at USEPA, Region 10, Seattle, WA 98101, USA
Fengkui Duan
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Tao Ma
Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
Shuping Zhang
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Kathleen Fahey
CORRESPONDING AUTHOR
Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27709, USA
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Cited
7 citations as recorded by crossref.
- Photochemical Modeling of Wintertime HOx Sources and Sinks in a Subarctic Urban Location A. Hoffman et al. https://doi.org/10.1021/acsestair.6c00254
- Aerosols in Northern Morocco (Part 4): Seasonal Chemical Signatures of PM2.5 and PM10 A. Benchrif et al. https://doi.org/10.3390/atmos16080982
- Updated In-Cloud Secondary Aerosol Production in the Northern Hemisphere Predicted by the Community Multiscale Air Quality Modeling System K. Fahey et al. https://doi.org/10.1021/acsearthspacechem.4c00370
- Solid Products of SO2 Uptake on a Methane Flame Soot I. Sulimenkov et al. https://doi.org/10.1134/S1990793125701593
- Simulated reductions in heterogeneous isoprene epoxydiol reactive uptake from aerosol morphology in the contiguous United States using the Community Multiscale Air Quality Model (CMAQv5.3.2) S. Farrell et al. https://doi.org/10.5194/acp-26-13557-2026
- Evidence for a New Oxidation Mechanism for Sulfur Dioxide from Laboratory Measurements W. Stockwell & R. Fitzgerald https://doi.org/10.3390/atmos16091000
- Year-Round Analysis of Multiphase Sulfate Production in Aerosol Particles in East Asia K. Travis et al. https://doi.org/10.1021/acsestair.5c00136
7 citations as recorded by crossref.
- Photochemical Modeling of Wintertime HOx Sources and Sinks in a Subarctic Urban Location A. Hoffman et al. https://doi.org/10.1021/acsestair.6c00254
- Aerosols in Northern Morocco (Part 4): Seasonal Chemical Signatures of PM2.5 and PM10 A. Benchrif et al. https://doi.org/10.3390/atmos16080982
- Updated In-Cloud Secondary Aerosol Production in the Northern Hemisphere Predicted by the Community Multiscale Air Quality Modeling System K. Fahey et al. https://doi.org/10.1021/acsearthspacechem.4c00370
- Solid Products of SO2 Uptake on a Methane Flame Soot I. Sulimenkov et al. https://doi.org/10.1134/S1990793125701593
- Simulated reductions in heterogeneous isoprene epoxydiol reactive uptake from aerosol morphology in the contiguous United States using the Community Multiscale Air Quality Model (CMAQv5.3.2) S. Farrell et al. https://doi.org/10.5194/acp-26-13557-2026
- Evidence for a New Oxidation Mechanism for Sulfur Dioxide from Laboratory Measurements W. Stockwell & R. Fitzgerald https://doi.org/10.3390/atmos16091000
- Year-Round Analysis of Multiphase Sulfate Production in Aerosol Particles in East Asia K. Travis et al. https://doi.org/10.1021/acsestair.5c00136
Saved (final revised paper)
Latest update: 10 Oct 2026
Short summary
In this work we implement heterogeneous sulfur chemistry into the Community Multiscale Air Quality (CMAQ) model. This new chemistry accounts for the formation of sulfate via aqueous oxidation of SO2 in aerosol liquid water and the formation of hydroxymethanesulfonate (HMS) – often confused by measurement techniques as sulfate. Model performance in predicting sulfur PM2.5 in Fairbanks, Alaska, and other places that experience dark and cold winters is improved.
In this work we implement heterogeneous sulfur chemistry into the Community Multiscale Air...
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