Source Apportionment of Regional Ozone Pollution Observed at Mount Tai, North China: Application of Lagrangian Photochemical Trajectory Model and Implications for Control Policy

A significant increase in ozone pollution over the North China Plain (NCP) has been identified, with Mount Tai serving as a key indicator for regional air quality. The study found that ozone pollution days rose sharply from 2006–2009 to 2018, particularly during warm seasons (April–September), where concentrations exceeded 75 ppbv on 59%–92% of days. Using a Lagrangian photochemical trajectory model, researchers traced the NCP as the primary source region, contributing 74% ± 27% to ozone levels during pollution episodes. The study revealed distinct regional sensitivities: southern air masses were highly sensitive to NOx emissions, while northern ones were limited by anthropogenic hydrocarbons, especially alkenes. Emission reductions from transportation and industry sectors could significantly mitigate ozone levels. Additionally, biomass burning influenced regional ozone under certain conditions. This research underscores the importance of mountaintop observations in assessing surface-level pollution and provides actionable insights for regional emission control policies.

Zhang, Y., Xue, L., Li, H., Chen, T., Mu, J., Dong, C., Sun, L., Liu, H., Zhao, Y., Wu, D., Wang, X., & Wang, W. (2021). Source Apportionment of Regional Ozone Pollution Observed at Mount Tai, North China: Application of Lagrangian Photochemical Trajectory Model and Implications for Control Policy. Journal of Geophysical Research: Atmospheres, 126(6). Portico. https://doi.org/10.1029/2020jd033519