Articles | Volume 20, issue 20
https://doi.org/10.5194/acp-20-11729-2020
https://doi.org/10.5194/acp-20-11729-2020
Research article
 | 
17 Oct 2020
Research article |  | 17 Oct 2020

Aerosol pH and chemical regimes of sulfate formation in aerosol water during winter haze in the North China Plain

Wei Tao, Hang Su, Guangjie Zheng, Jiandong Wang, Chao Wei, Lixia Liu, Nan Ma, Meng Li, Qiang Zhang, Ulrich Pöschl, and Yafang Cheng

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Short summary
We simulated the thermodynamic and multiphase reactions in aerosol water during a wintertime haze event over the North China Plain. It was found that aerosol pH exhibited a strong spatiotemporal variability, and multiple oxidation pathways were predominant for particulate sulfate formation in different locations. Sensitivity tests further showed that ammonia, crustal particles, and dissolved transition metal ions were important factors for multiphase chemistry during haze episodes.
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