Analysis of aerosol type changes in Wuhan City under the outbreak of COVID-19 epidemic

doi:10.6046/zrzyyg.2020266

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Abstract

This study aims to compare and analyze the effects of social control and industrial shutdown induced by the COVID-19 epidemic on the particulate matter and aerosol types in Wuhan City, Hubei Province. To this end, the aerosol optical depth (AOD) and fine mode fraction (FMF) data of Wuhan City from December 1, 2019 to April 30, 2020 were obtained based on the data of atmospheric particulate matter (PM₁₀ and PM_2.5) and the data from MODIS aerosol products. Then the models of four types of aerosols (urban/industrial, sand-dust, clean marine, and mixed types) were established, obtaining the following results. During the period of social control and industrial shutdown, the concentration of atmospheric particulate matter showed a downward trend owing to the reduction in anthropogenic emissions. Meanwhile, the proportion of urban/industrial aerosols also showed a downward trend, while the proportion of dry and clean marine aerosols increased to 13.4% in the period except for the Spring Festival holiday. In contrast, the atmospheric particulate matter and the aerosols of the above types showed opposite trends after the ordered resumption of work and production. Compared with the same period during 2017—2019, the concentration of atmospheric particulate matter and aerosol parameters were also lower during the continuous control and shutdown after the Spring Festival. It can be inferred that MODIS aerosol products can be used to effectively obtain the characteristics of regional aerosols and thus provide data for the monitoring and governance of the regional atmospheric environment.

Keywords COVID-19 Wuhan City particulate matter MODIS aerosol types

ZTFLH:

P407X87

Corresponding Authors: ZHA Yong E-mail: 347128908@qq.com;yzha@njnu.edu.cn

Issue Date: 24 September 2021

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	Geng WEI
	Yuqiao HOU
	Yong ZHA

Cite this article:

Geng WEI,Yuqiao HOU,Yong ZHA. Analysis of aerosol type changes in Wuhan City under the outbreak of COVID-19 epidemic[J]. Remote Sensing for Natural Resources, 2021, 33(3): 238-245.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2020266 OR https://www.gtzyyg.com/EN/Y2021/V33/I3/238

Fig.1 Image of Hubei Province and scope of Wuhan City

Tab.1 Time stage division during COVID-19 epidemic situation

Tab.2 Division of stage III over past years

Fig.2 AOD and FMF spatial distribution in Wuhan City from December 2019 to April 2020

Fig.3 Classification of aerosol types

Fig.4 Daily mean mass concentration of particulate matter

Tab.3 Mean mass concentration of particulate matter and mean value of aerosol characteristics in each stage of COVID-19 epidemic situation

Fig.5 Daily mean mass concentration of particulate matter in stage III from 2017 to 2020

Tab.4 Mean mass concentration of particulate matter and mean value of aerosol characteristics in stage III from 2017 to 2020

Fig.6 Spatial distribution of aerosol parameters in different stages of COVID-19 epidemic situation

Fig.7 Classification of aerosol characteristics in different stages of COVID-19 epidemic situation

Fig.8 Space distribution of aerosol parameters in stage Ⅲ from 2017 to 2020

Fig.9 Classification of aerosol characteristics in stage III from 2017 to 2020

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