Articles | Volume 23, issue 21
https://doi.org/10.5194/acp-23-13597-2023
https://doi.org/10.5194/acp-23-13597-2023
Research article
 | 
01 Nov 2023
Research article |  | 01 Nov 2023

Mixing state and effective density of aerosol particles during the Beijing 2022 Olympic Winter Games

Aodong Du, Jiaxing Sun, Hang Liu, Weiqi Xu, Wei Zhou, Yuting Zhang, Lei Li, Xubing Du, Yan Li, Xiaole Pan, Zifa Wang, and Yele Sun

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We characterized the impacts of emission controls on particle mixing state and density during the Beijing Olympic Winter Games using a SPAMS in tandem with a DMA and an AAC. OC and sulfate-containing particles increased, while those from primary emissions decreased. The effective particle densities increased and varied largely for different particles, highlighting the impacts of aging and formation processes on the changes of particle density and mixing state.
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