Analysis of the variations and causes of air pollutants in Tangshan City before and after the COVID-19 pandemic from 2019 to 2021

doi:10.6046/zrzyyg.2022409

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Abstract

To investigate the anthropogenic influence on air pollution before and after the COVID-19 pandemic, this study analyzed the variations and causes of air pollutants in Tangshan City from 2019 to 2021. It derived the changes in their concentrations and their influencing factors in each time period using an estimation model for emission reduction effects and an inverse distance interpolation method. Accordingly, this study proposed reasonable suggestions for the atmospheric environment control in Tangshan. The results show that: ① From 2019 to 2021, the proportions of primary pollutants in Tangshan remained relatively stable, with PM_2.5 ranking first and photochemical pollution represented by O₃ increasing significantly in recent years; ② The results calculated using the formula for anthropogenic emission reduction show that the control over anthropogenic emissions plays a significant role in constraining air pollution; ③ The analysis based on the inverse distance interpolation method indicates that the peak concentration of PM_2.5 gradually decreased, with the high-concentration distribution shifting toward the city center.

Keywords COVID-19 Tangshan City characteristics of air pollutants anthropogenic influence

ZTFLH:	TP79
	X51

Issue Date: 13 March 2024

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	Dongling MA
	Yongqiang REN
	Xingtong CHEN
	Jinge KONG

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Dongling MA,Yongqiang REN,Xingtong CHEN, et al. Analysis of the variations and causes of air pollutants in Tangshan City before and after the COVID-19 pandemic from 2019 to 2021[J]. Remote Sensing for Natural Resources, 2024, 36(1): 275-280.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2022409 OR https://www.gtzyyg.com/EN/Y2024/V36/I1/275

Fig.1 Distribution map of state-controlled stations in Tangshan City

Fig.2 Variation curve of air pollutant concentration and AQI seasonal mean from 2019 to 2021

Fig.3 Daily variation diagram of PM_2.5 in heavy pollution stage

Fig.4 Temperature trend in heavy pollution stage

Fig.5 Rose chart of wind direction in heavy pollution stage

Fig.6 Pollution rose chart of heavy pollution stage

Tab.1 Estimated value of local emission and man-made emission reduction in Tangshan at the initial stage of prevention and control

Fig.7 PM_2.5 concentration distribution map in 2019

Fig.8 PM_2.5 concentration distribution map in 2020

Fig.9 PM_2.5 concentration distribution map in 2021

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