Articles | Volume 23, issue 21
https://doi.org/10.5194/acp-23-13685-2023
https://doi.org/10.5194/acp-23-13685-2023
Research article
 | 
03 Nov 2023
Research article |  | 03 Nov 2023

Understanding offshore high-ozone events during TRACER-AQ 2021 in Houston: insights from WRF–CAMx photochemical modeling

Wei Li, Yuxuan Wang, Xueying Liu, Ehsan Soleimanian, Travis Griggs, James Flynn, and Paul Walter

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Cited articles

Abdi-Oskouei, M., Carmichael, G., Christiansen, M., Ferrada, G., Roozitalab, B., Sobhani, N., Wade, K., Czarnetzki, A., Pierce, R. B., Wagner, T., and Stanier, C.: Sensitivity of Meteorological Skill to Selection of WRF-Chem Physical Parameterizations and Impact on Ozone Prediction During the Lake Michigan Ozone Study (LMOS), J. Geophys. Res.-Atmos., 125, e2019JD031971, https://doi.org/10.1029/2019JD031971, 2020. 
Abdi-Oskouei, M., Roozitalab, B., Stanier, C. O., Christiansen, M., Pfister, G., Pierce, R. B., McDonald, B. C., Adelman, Z., Janseen, M., Dickens, A. F., and Carmichael, G. R.: The Impact of Volatile Chemical Products, Other VOCs, and NOx on Peak Ozone in the Lake Michigan Region, J. Geophys. Res.-Atmos., 127, e2022JD037042, https://doi.org/10.1029/2022JD037042, 2022. 
Baker, K. R., Liljegren, J., Valin, L., Judd, L., Szykman, J., Millet, D. B., Czarnetzki, A., Whitehill, A., Murphy, B., and Stanier, C.: Photochemical model representation of ozone and precursors during the 2017 Lake Michigan ozone study (LMOS), Atmos. Environ., 293, 119465, https://doi.org/10.1016/j.atmosenv.2022.119465, 2023. 
Banta, R. M., Senff, C. J., Nielsen-Gammon, J., Darby, L. S., Ryerson, T. B., Alvarez, R. J., Sandberg, S. P., Williams, E. J., and Trainer, M.: A Bad Air Day in Houston, B. Am. Meteorol. Soc., 86, 657–670, https://doi.org/10.1175/BAMS-86-5-657, 2005. 
Bernier, C., Wang, Y., Gronoff, G., Berkoff, T., Knowland, K. E., Sullivan, J. T., Delgado, R., Caicedo, V., and Carroll, B.: Cluster-based characterization of multi-dimensional tropospheric ozone variability in coastal regions: an analysis of lidar measurements and model results, Atmos. Chem. Phys., 22, 15313–15331, https://doi.org/10.5194/acp-22-15313-2022, 2022. 
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Short summary
This study examined high offshore ozone events in Galveston Bay and the Gulf of Mexico, using boat data and WRF–CAMx modeling during the TRACER-AQ 2021 field campaign. On average, high ozone is caused by chemistry due to the regional transport of volatile organic compounds and downwind advection of NOx from the ship channel. Two case studies show advection of ozone can be another process leading to high ozone, and accurate wind prediction is crucial for air quality forecasting in coastal areas.
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