Changes in stoichiometric characteristics of ambient air pollutants pre-to post-COVID-19 in China.

ABSTRACT: To prevent the Corona Virus Disease 2019 (COVID-19) spreading, Chinese government takes a series of corresponding measures to restrict human mobility, including transportation lock-down and industries suspension, which significantly influenced the ambient air quality and provided vary rare time windows to assess the impacts of anthropological activities on air pollution. In this work, we divided the studied timeframe (2019/12/24-2020/2/24) into four periods and selected 88 cities from 31 representative urban agglomerations. The indicators of PM_2.5/PM₁₀ and NO₂/SO₂ were applied, for the first time, to analyze the changes in stoichiometric characteristics of ambient air pollutants pre-to post-COVID-19 in China. The results indicated that the ratios

SUBMITTER: Bai Y 

PROVIDER: S-EPMC8800168 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature