Articles | Volume 20, issue 20
Atmos. Chem. Phys., 20, 11729–11746, 2020
https://doi.org/10.5194/acp-20-11729-2020
Atmos. Chem. Phys., 20, 11729–11746, 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 et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Wei Tao on behalf of the Authors (07 Aug 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (18 Aug 2020) by Veli-Matti Kerminen
RR by Anonymous Referee #2 (26 Aug 2020)
ED: Publish as is (26 Aug 2020) by Veli-Matti Kerminen
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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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