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Analysis of Factors Influencing Air Quality in Different Periods during COVID-19: A Case Study of Tangshan, China.
Wu, Wen-Lu; Shan, Chun-Yan; Liu, Jing; Zhao, Jing-Lin; Long, Jin-Yun.
  • Wu WL; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
  • Shan CY; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
  • Liu J; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
  • Zhao JL; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
  • Long JY; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Int J Environ Res Public Health ; 20(5)2023 02 26.
Article in English | MEDLINE | ID: covidwho-2287064
ABSTRACT
This study aimed to analyze the main factors influencing air quality in Tangshan during COVID-19, covering three different periods the COVID-19 period, the Level I response period, and the Spring Festival period. Comparative analysis and the difference-in-differences (DID) method were used to explore differences in air quality between different stages of the epidemic and different years. During the COVID-19 period, the air quality index (AQI) and the concentrations of six conventional air pollutants (PM2.5, PM10, SO2, NO2, CO, and O3-8h) decreased significantly compared to 2017-2019. For the Level I response period, the reduction in AQI caused by COVID-19 control measures were 29.07%, 31.43%, and 20.04% in February, March, and April of 2020, respectively. During the Spring Festival, the concentrations of the six pollutants were significantly higher than those in 2019 and 2021, which may be related to heavy pollution events caused by unfavorable meteorological conditions and regional transport. As for the further improvement in air quality, it is necessary to take strict measures to prevent and control air pollution while paying attention to meteorological factors.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Air Pollutants / Air Pollution / Environmental Pollutants / COVID-19 Type of study: Case report / Observational study Limits: Humans Country/Region as subject: Asia Language: English Year: 2023 Document Type: Article Affiliation country: Ijerph20054199

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Air Pollutants / Air Pollution / Environmental Pollutants / COVID-19 Type of study: Case report / Observational study Limits: Humans Country/Region as subject: Asia Language: English Year: 2023 Document Type: Article Affiliation country: Ijerph20054199