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

WEI Geng; HOU Yuqiao; ZHA Yong

doi:10.6046/zrzyyg.2020266

2021 Vol. 33, No. 3

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WEI Geng, HOU Yuqiao, ZHA Yong. 2021. Analysis of aerosol type changes in Wuhan City under the outbreak of COVID-19 epidemic. Remote Sensing for Natural Resources, 33(3): 238-245. doi: 10.6046/zrzyyg.2020266

Citation:

WEI Geng, HOU Yuqiao, ZHA Yong. 2021. Analysis of aerosol type changes in Wuhan City under the outbreak of COVID-19 epidemic. Remote Sensing for Natural Resources, 33(3): 238-245. doi: 10.6046/zrzyyg.2020266

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

School of Geography Science, Nanjing Normal University, Nanjing 210023, China

Received Date: 28 August 2020

Publish Date: 15 September 2021

Abstract

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.
- COVID-19 /
- Wuhan City /
- particulate matter /
- MODIS /
- aerosol types /

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References

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