Articles | Volume 26, issue 18
https://doi.org/10.5194/acp-26-13557-2026
© Author(s) 2026. 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-26-13557-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Sep 2026
Research article |
| 25 Sep 2026
| 25 Sep 2026
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)
Sara L. Farrell
CORRESPONDING AUTHOR
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Quazi Z. Rasool
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder, CO, USA
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
Havala O. T. Pye
Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27709, USA
Yue Zhang
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
now at: Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843, USA
Department of Chemistry, University of California, Irvine, 92697 CA, USA
now at: School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
Yuzhi Chen
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Chi-Tsan Wang
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
now at: Center for Spatial Information Science and Systems (CSISS), George Mason University, VA 22030, USA
Haofei Zhang
Department of Chemistry, University of California, Riverside, CA 92521
Ryan Schmedding
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, H3A 2K6, Canada
Manabu Shiraiwa
Department of Chemistry, University of California, Irvine, 92697 CA, USA
Jaime Green
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Sri H. Budisulistiorini
Wolfson Atmospheric Chemistry Laboratories, University of York, York, UK
Jose L. Jimenez
Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder, CO, USA
Weiwei Hu
Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder, CO, USA
NOAA Chemical Sciences Laboratory, Boulder, CO, USA
now at: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
Jason D. Surratt
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Cited
2 citations as recorded by crossref.
- Particle Acidity and Seed Aerosol Drive the Spatiotemporal Dynamics of Isoprene-Epoxydiol-Derived Secondary Organic Aerosols in Eastern China F. Chang et al. https://doi.org/10.1021/acs.est.5c14957
- Improved representation of isoprene-derived secondary organic aerosol in CAM6-Chem reveals regional contrasts in its long-term changes over China W. Zhang et al. https://doi.org/10.5194/acp-26-11967-2026
2 citations as recorded by crossref.
- Particle Acidity and Seed Aerosol Drive the Spatiotemporal Dynamics of Isoprene-Epoxydiol-Derived Secondary Organic Aerosols in Eastern China F. Chang et al. https://doi.org/10.1021/acs.est.5c14957
- Improved representation of isoprene-derived secondary organic aerosol in CAM6-Chem reveals regional contrasts in its long-term changes over China W. Zhang et al. https://doi.org/10.5194/acp-26-11967-2026
Latest update: 15 Oct 2026
Short summary
Fine particulate matter (PM2.5) has become increasingly important to regulate and model. In this study, we parameterize non-ideal aerosol mixing and phase state into the Community Multiscale Air Quality (CMAQ) model and analyze its impact on the formation of a globally important source of PM2.5, isoprene epoxydiol (IEPOX)-derived PM2.5. Incorporating these features furthers model bias in IEPOX-derived PM2.5, however, this work provides potential phase state bounds for future PM2.5 modeling work.
Fine particulate matter (PM2.5) has become increasingly important to regulate and model. In this...
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