Meteorological influences on co-occurrence of O₃ and PM_2.5 pollution and implication for emission reductions in Beijing-Tianjin-Hebei.

ABSTRACT: Co-occurrence of surface ozone (O₃) and fine particulate matter (PM_2.5) pollution (CP) was frequently observed in Beijing-Tianjin-Hebei (BTH). More than 50% of CP days occurred during April-May in BTH, and the CP days reached up to 11 in two months of 2018. The PM_2.5 or O₃ concentration associated with CP was lower than but close to that in O₃ and PM_2.5 pollution, indicating compound harms during CP days with double-high concentrations of PM_2.5 and O₃. CP days were significantly facilitated by joint effects of the Rossby wave train that consisted of two centers associated with the Scandinavia pattern and one center over North China as well as a hot, wet, and stagnant environmental condition in BTH. Afte

SUBMITTER: Ma X 

PROVIDER: S-EPMC10205161 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature