Articles | Volume 18, issue 8
https://doi.org/10.5194/acp-18-5515-2018
https://doi.org/10.5194/acp-18-5515-2018
Research article
 | 
23 Apr 2018
Research article |  | 23 Apr 2018

Isotopic constraints on heterogeneous sulfate production in Beijing haze

Pengzhen He, Becky Alexander, Lei Geng, Xiyuan Chi, Shidong Fan, Haicong Zhan, Hui Kang, Guangjie Zheng, Yafang Cheng, Hang Su, Cheng Liu, and Zhouqing Xie

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Zhouqing Xie on behalf of the Authors (18 Jan 2018)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (17 Feb 2018) by Jan Kaiser
RR by Mang Lin (21 Feb 2018)
RR by Anonymous Referee #3 (02 Mar 2018)
ED: Publish subject to minor revisions (review by editor) (13 Mar 2018) by Jan Kaiser
AR by Zhouqing Xie on behalf of the Authors (21 Mar 2018)  Author's response   Manuscript 
ED: Publish subject to technical corrections (24 Mar 2018) by Jan Kaiser
AR by Zhouqing Xie on behalf of the Authors (29 Mar 2018)  Author's response   Manuscript 
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Short summary
We use observations of the oxygen isotopic composition of sulfate aerosol as a fingerprint to quantify various sulfate formation mechanisms during pollution events in Beijing, China. We found that heterogeneous reactions on aerosols dominated sulfate production in general; however, in-cloud reactions would dominate haze sulfate production when cloud liquid water content was high. The findings also suggest the heterogeneity of aerosol acidity should be parameterized in models.
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