Evident PM<sub>2.5</sub> drops in the east of China due to the COVID-19 quarantine measures in February

Yin, Zhicong; Zhang, Yijia; Wang, Huijun; Li, Yuyan

doi:https://doi.org/10.5194/acp-21-1581-2021

Articles | Volume 21, issue 3

https://doi.org/10.5194/acp-21-1581-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-1581-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 3

Research article

|

04 Feb 2021

Research article |

| 04 Feb 2021

Evident PM_2.5 drops in the east of China due to the COVID-19 quarantine measures in February

Zhicong Yin, Yijia Zhang, Huijun Wang, and Yuyan Li

Supplement

https://doi.org/10.5194/acp-21-1581-2021-supplement

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 PM_2.5 related to the COVID-19 pandemic was found in North China. The COVID-19 quarantine measures decreased the PM_2.5 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 PM_2.5 driven by meteorology (13 %).

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

Supplement

Data sets

Evident PM_2.5 drops in the east of China due to the COVID-19 quarantine measures in February