Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Exploring the Air Pollution Control Direction of Two Typical Cities, Beijing and Wuhan, from the Air Pollution under Emergency Responses during COVID-19

Version 1 : Received: 10 March 2021 / Approved: 11 March 2021 / Online: 11 March 2021 (14:51:22 CET)

How to cite: Qin, A.T. Exploring the Air Pollution Control Direction of Two Typical Cities, Beijing and Wuhan, from the Air Pollution under Emergency Responses during COVID-19. Preprints 2021, 2021030320 (doi: 10.20944/preprints202103.0320.v1). Qin, A.T. Exploring the Air Pollution Control Direction of Two Typical Cities, Beijing and Wuhan, from the Air Pollution under Emergency Responses during COVID-19. Preprints 2021, 2021030320 (doi: 10.20944/preprints202103.0320.v1).

Abstract

: During the period of COVID-19, the Chinese government implemented a series of actions to prevent the spread of the virus. It is noticed that these preventive actions have generated positive effects on air pollution in Wuhan and Beijing. And, due to the differences in city functions, geographic locations, meteorological conditions, and preventive action details between the two cities, noticeable difference is observed on how they reduced air pollution. This unfortunate incident has become a social sample for studying the industrial and livelihood activities impact on air pollution, otherwise would be highly impossible. This paper starts from observing data from NASA's real-time fine particulate matter (PM2.5) and NO2, and comparing the air pollution in this special time domain with previous years. It is discovered that both PM2.5 and NO2 have been reduced in Wuhan, while only NO2 has significant reduction in Beijing, during the COVID-19 responses. This suggests that the human activity suppression by the COVID-19 control yields different effects on different pollutants and in different cities. Possible reasons for such effects are analysed by considering the public health control levels as well as the pollutant migration, industrial activities, and the weather conditions.

Keywords

COVID-19; air pollution; PM2.5; NOx; MERRA-2; OMNO2

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