2021
DOI: 10.1016/j.atmosres.2020.105362
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COVID-19 pandemic in Wuhan: Ambient air quality and the relationships between criteria air pollutants and meteorological variables before, during, and after lockdown

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Cited by 94 publications
(78 citation statements)
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References 30 publications
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“…This was likely to be due to the location of Delhi as it is inland and would generally experience low SO 2 concentrations. Compared to other studies, higher reduction of SO 2 than this study was observed ( Nakada and Urban, 2020 ; Sulaymon et al., 2021 ; Tobías et al., 2020 ; Yuan et al., 2021 ) which suggested that the different levels of SO 2 during the regular day without lockdown could be unlikely due to different intensity and source of SO 2 concentration, which in turns provide different percentages of reduction. Furthermore, the effect of strengthened air pollution regulation during the APEC Meeting and the Victory-day Parade in Beijing; and World Internet Conference in Jiaxing which had reported reduction of 56.5% and 7.1% which suggested effectiveness of stringent regulation to reduced air pollution ( Li et al., 2017 ; Shen et al., 2017 ).…”
Section: Resultscontrasting
confidence: 94%
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“…This was likely to be due to the location of Delhi as it is inland and would generally experience low SO 2 concentrations. Compared to other studies, higher reduction of SO 2 than this study was observed ( Nakada and Urban, 2020 ; Sulaymon et al., 2021 ; Tobías et al., 2020 ; Yuan et al., 2021 ) which suggested that the different levels of SO 2 during the regular day without lockdown could be unlikely due to different intensity and source of SO 2 concentration, which in turns provide different percentages of reduction. Furthermore, the effect of strengthened air pollution regulation during the APEC Meeting and the Victory-day Parade in Beijing; and World Internet Conference in Jiaxing which had reported reduction of 56.5% and 7.1% which suggested effectiveness of stringent regulation to reduced air pollution ( Li et al., 2017 ; Shen et al., 2017 ).…”
Section: Resultscontrasting
confidence: 94%
“…Decreases in the calculated average monthly concentrations of NO 2 were observed in Alor Star, Ipoh, Johor Bahru, Kuala Lumpur and Seremban. Higher NO 2 concentration during lockdown were observed by Bao and Zhang (2020) , Nakada and Urban (2020) , Sulaymon et al. (2021) and Tobías et al.…”
Section: Resultsmentioning
confidence: 88%
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“…As shown in Fig. 2 , compared with the preceding period of COVID-19 lockdown, the average concentration of PM2.5 has decreased by 38% in California ( Liu et al, 2020b ), 21.8% in Hat Yai, Thailand ( Stratoulias and Nuthammachot, 2020 ), 52% in Pearl River Delta ( Wang et al, 2021 ) and 41.2% in Wuhan ( Sulaymon et al, 2021 ) during COVID-19 lockdown, and the average concentration of PM 10 has decreased by 31% in Barcelona, Spain ( Tobias et al, 2020 ), 22.9% in Hat Yai, Thailand ( Stratoulias and Nuthammachot, 2020 ) and 33.1% in Wuhan ( Sulaymon et al, 2021 ). Compared with the preceding years, PM 2.5 and PM 10 mass concentrations of 22 cities in India decreased by about 43% and 31% during the lockdown ( Sharma et al, 2020 ).…”
Section: Changes In Aerosol Pollution During Covid-19mentioning
confidence: 93%
“…Recent satellite data analysis-based reports by the Copernicus Atmosphere Monitoring Service confirm a reduction of air pollutants in the main European cities during the lockdown. Most studies that analyzed air pollution by including meteorological variables, such as temperature, wind speed, wind direction, and humidity concluded that meteorological variables had no significant effect on air pollutant concentration during the pandemic [28][29][30].…”
Section: Introductionmentioning
confidence: 99%