Air pollution episodes during the COVID-19 outbreak in the Beijing-Tianjin-Hebei region of China: An insight into the transport pathways and source distribution.

ABSTRACT: Although anthropogenic emissions decreased, polluted days still occurred in the Beijing-Tianjin-Hebei (BTH) region during the initial outbreak of the coronavirus disease (COVID-19). Analysis of the characteristics and source distribution of large-scale air pollution episodes during the COVID-19 outbreak (from 23 January to April 8, 2020) in the BTH region is helpful for exploring the efficacy of control measures and policy making. The results indicated that the BTH region suffered two large-scale air pollution episodes (23-28 January and 8-13 February), which were characterized by elevated PM_2.5, SO₂, NO₂, and CO concentrations, while the O₃ concentration decreased by 1.5%-33.9% (except in Shijiazhuang, where it increased by 16.6% during the seco

SUBMITTER: Zhao N 

PROVIDER: S-EPMC7477629 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature