Evolution of Ozone Formation Sensitivity during a Persistent Regional Ozone Episode in Northeastern China and Its Implication for a Control Strategy.

ABSTRACT: In recent years, the magnitude and frequency of regional ozone (O₃) episodes have increased in China. We combined ground-based measurements, observation-based model (OBM), and the Weather Research and Forecasting and Community Multiscale Air Quality (WRF-CMAQ) model to analyze a typical persistent O₃ episode that occurred across 88 cities in northeastern China during June 19-30, 2021. The meteorological conditions, particularly the wind convergence centers, played crucial roles in the evolution of O₃ pollution. Daily analysis of the O₃ formation sensitivity showed that O₃ formation was in the volatile organic compound (VOC)-limited or transitional regime at the onset of the pollution episode in 92% of the cities. Conversely, it tended

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC10786154 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature