Significant Reduction in Fine Particulate Matter in Beijing during 2022 Beijing Winter Olympics

Yu Liu, Xiaojuan Xu, Xiaoyang Yang, Jun He, Dongsheng Ji, Yuesi Wang

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)


To investigate the air quality improvement during 2022 Beijing Winter Olympic Games (WOG), continuous hourly observations of fine particulate matter (PM2.5) and chemical fractions were performed in Beijing from January to March 2017-2022. Benefiting from the aggressive mitigation measures, significant reductions in the PM2.5concentrations and chemical species in Beijing were observed during WOG. During strict control period, six sources of PM2.5in Beijing were identified with positive matrix factorization model including secondary source (SS), industrial emissions (IEs), vehicle emissions (VEs), coal combustion (CC), fireworks burning (FB), and dust. Additionally, an obvious decline was observed in the sources of PM2.5, and no contribution of FB was quantitatively identified in 2022. Based on the multiple linear regression analysis, it found that meteorological parameters accounted for 46.1% of the total variation in the PM2.5concentration, while source control measures accounted for 53.9% of the total variation, indicating that aggressive mitigation measures played a more important role in the decline in the PM2.5concentration than meteorological conditions. This study could provide valuable insight into achieving air quality improvement and formulating policies in developing countries plagued by heavy air pollution.

Original languageEnglish
Pages (from-to)822-828
Number of pages7
JournalEnvironmental Science and Technology Letters
Issue number10
Publication statusPublished - 11 Oct 2022


  • Beijing Winter Olympics
  • PM
  • chemical fraction
  • control policy
  • multiple linear regression
  • source apportionment

ASJC Scopus subject areas

  • Environmental Chemistry
  • Ecology
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


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