Articles | Volume 21, issue 3
Atmos. Chem. Phys., 21, 1581–1592, 2021
https://doi.org/10.5194/acp-21-1581-2021
Atmos. Chem. Phys., 21, 1581–1592, 2021
https://doi.org/10.5194/acp-21-1581-2021

Research article 04 Feb 2021

Research article | 04 Feb 2021

Evident PM2.5 drops in the east of China due to the COVID-19 quarantine measures in February

Zhicong Yin et al.

Data sets

Meteorological data ERA5 https://cds.climate.copernicus.eu/cdsapp#!/search?type=dataset

PM2.5 monitoring network CNEMC (China National Environmental Monitoring Centre) https://quotsoft.net/air/

Emission scalar for 1985 Annual Scalar http://geoschemdata.computecanada.ca/ExtData/HEMCO/AnnualScalar

Emissions for 2010 MIX http://geoschemdata.computecanada.ca/ExtData/HEMCO/MIX

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Short summary
It is a must to disentangle the contributions of stable meteorology from the effects of the COVID-19 lockdown. A 59 % decline in PM2.5 related to the COVID-19 pandemic was found in North China. The COVID-19 quarantine measures decreased the PM2.5 in the Yangtze River Delta by 72 %. In Hubei Province where most pneumonia cases were confirmed, the impact of the total emission reduction (72 %) evidently exceeded the rising percentage of PM2.5 driven by meteorology (13 %).
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