Articles | Volume 21, issue 2
Atmos. Chem. Phys., 21, 915–926, 2021
https://doi.org/10.5194/acp-21-915-2021
Atmos. Chem. Phys., 21, 915–926, 2021
https://doi.org/10.5194/acp-21-915-2021

Research article 22 Jan 2021

Research article | 22 Jan 2021

Enhancement of secondary aerosol formation by reduced anthropogenic emissions during Spring Festival 2019 and enlightenment for regional PM2.5 control in Beijing

Yuying Wang et al.

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Short summary
The unexpected increase in surface ozone concentration was found along with the reduced anthropogenic emissions during the 2019 Chinese Spring Festival in Beijing. The enhanced atmospheric oxidation capacity could promote the formation of secondary aerosols, especially sulfate, which offset the decrease in PM2.5 mass concentration. This phenomenon was likely to exist throughout the entire Beijing–Tianjin–Hebei (BTH) region to be a contributing factor to the haze during the COVID-19 lockdown.
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