Articles | Volume 25, issue 22
https://doi.org/10.5194/acp-25-16631-2025
© 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-25-16631-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
24 Nov 2025
Research article |
| 24 Nov 2025
Quantifying forest canopy shading and turbulence effects on boundary layer ozone over the United States
Chi-Tsan Wang
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Patrick C. Campbell
CORRESPONDING AUTHOR
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Cooperative Institute for Satellite Earth System Studies (CISESS), George Mason University, Fairfax, VA, USA
NOAA Air Resources Laboratory, College Park, MD, USA
Paul Makar
Environment and Climate Change Canada (ECCC), Toronto, ON, Canada
Siqi Ma
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Irena Ivanova
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Cooperative Institute for Satellite Earth System Studies (CISESS), George Mason University, Fairfax, VA, USA
NOAA Air Resources Laboratory, College Park, MD, USA
Bok H. Baek
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Wei-Ting Hung
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Cooperative Institute for Satellite Earth System Studies (CISESS), George Mason University, Fairfax, VA, USA
NOAA Air Resources Laboratory, College Park, MD, USA
Zachary Moon
Earth Resources Technology, Inc., Laurel, MD, USA
Youhua Tang
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Cooperative Institute for Satellite Earth System Studies (CISESS), George Mason University, Fairfax, VA, USA
NOAA Air Resources Laboratory, College Park, MD, USA
Barry Baker
NOAA Air Resources Laboratory, College Park, MD, USA
Rick Saylor
NOAA Air Resources Laboratory, College Park, MD, USA
Jung-Hun Woo
Graduate School of Environmental Studies (GSES), Seoul National University, South Korea
Daniel Tong
Center for Satellite and Earth Science Research (CSER), George Mason University, Fairfax, VA, USA
Model code and software
GMU-SESS-AQ/CMAQ: GMU Canopy Tag for CMAQv5.3.1 Patrick Campbell et al. https://zenodo.org/records/14502375
The NOAA-EPA Atmosphere-Chemistry Coupler (NACC) Patrick C. Campbell https://doi.org/10.5281/zenodo.10277248
Short summary
Forests influence air quality by altering ozone levels, but most air pollution models overlook canopy effects. Our study improves ozone predictions by incorporating forest canopy shading and turbulence into a widely used model. We found that tree cover reduces near-surface ozone by decreasing photolysis rates and diffusion inside canopy, resulting in lower ozone concentrations in densely forested areas. These findings enhance ozone surface prediction accuracy and improve air quality modeling.
Forests influence air quality by altering ozone levels, but most air pollution models overlook...
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