Articles | Volume 23, issue 9
https://doi.org/10.5194/acp-23-5419-2023
https://doi.org/10.5194/acp-23-5419-2023
Research article
 | 
16 May 2023
Research article |  | 16 May 2023

Multiple pathways for the formation of secondary organic aerosol in the North China Plain in summer

Yifang Gu, Ru-Jin Huang, Jing Duan, Wei Xu, Chunshui Lin, Haobin Zhong, Ying Wang, Haiyan Ni, Quan Liu, Ruiguang Xu, Litao Wang, and Yong Jie Li

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Latest update: 22 Jun 2024
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Short summary
Secondary organic aerosol (SOA) can be produced by various pathways, but its formation mechanisms are unclear. Observations were conducted in the North China Plain during a highly oxidizing atmosphere in summer. We found that fast photochemistry dominated SOA formation during daytime. Two types of aqueous-phase chemistry (nocturnal and daytime processing) take place at high relative humidity. The potential transformation from primary organic aerosol (POA) to SOA was also an important pathway.
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