The Spring Festival Effect: The change in NO2 column concentration in China caused by the migration of human activities
Atmospheric Pollution Research
; : 101232, 2021.
Article
in English
| ScienceDirect | ID: covidwho-1466049
ABSTRACT
The Spring Festival is the most important holiday in China, and human activity and population mobility may contribute greatly to air quality. According to the satellite-based tropospheric nitrogen dioxide (NO2) column and ground-based observational concentration of NO2 in megacities from 2013 to 2018 around the Spring Festival, we found that NO2 concentration obviously decreases, presenting a “tide phenomenon”, particularly in the megacities, with the tropospheric NO2 column density decreasing by 31.8%–44.5%. The tropospheric NO2 column density in Beijing decreased by 41.6% and rebounded by 22.3% after the festival. Vehicle sources were among the important causes of NOx emissions in the megacities, and traffic intensity decreased significantly during the festival. As the coronavirus disease 2019 (COVID-19) pandemic progresses, the traffic intensity in urban areas is decreasing significantly, with the tropospheric NO2 column density decreasing by 56.2% and rebounding by only 6.8% in 2020, without the “tide phenomenon”.
Full text:
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Collection:
Databases of international organizations
Database:
ScienceDirect
Type of study:
Experimental Studies
Language:
English
Journal:
Atmospheric Pollution Research
Year:
2021
Document Type:
Article
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