Articles | Volume 25, issue 18
https://doi.org/10.5194/acp-25-11261-2025
https://doi.org/10.5194/acp-25-11261-2025
Research article
 | 
25 Sep 2025
Research article |  | 25 Sep 2025

Seasonal trends in the wintertime photochemical regime of the Uinta Basin, Utah, USA

Marc L. Mansfield and Seth N. Lyman

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Cited articles

Bishop, G. A., Haugen, M. J., McDonald, B. C., and Boies, A. M.: Utah Wintertime Measurements of Heavy-Duty Vehicle Nitrogen Oxide Emission Factors, Environ. Sci. Technol., 56, 1885–1893, https://doi.org/10.1021/acs.est.1c06428, 2022. 
Choi, Y., Kim, H., Tong, D., and Lee, P.: Summertime weekly cycles of observed and modeled NOx and O3 concentrations as a function of satellite-derived ozone production sensitivity and land use types over the Continental United States, Atmos. Chem. Phys., 12, 6291–6307, https://doi.org/10.5194/acp-12-6291-2012, 2012. 
Chou, C. C.-K., Tsai, C.-Y., Shiu, C.-J., Liu, S. C., and Zhu, T.: Measurement of NOy during Campaign of Air Quality Research in Beijing 2006 (CAREBeijing-2006): Implications for the ozone production efficiency of NOx, J. Geophys. Res., 114, D00G01, https://doi.org/10.1029/2008JD010446, 2009. 
Dardiotis, C., Martini, G., Marotta, A., and Manfredi, U.: Low-temperature cold-start gaseous emissions of late technology passenger cars, Appl. Energ., 111, 468–478, https://doi.org/10.1016/j.apenergy.2013.04.093, 2013. 
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Precursor compounds must be present in the lower atmosphere for ozone to form. Ozone abatement strategies focus on reducing such precursors, but measuring and modeling are necessary to determine the most efficient way to do this. We show that the sensitivity of ozone to various precursors changes over the course of the winter. We also argue that similar seasonal changes probably occur in many regions of the Northern Hemisphere.
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