Articles | Volume 19, issue 14
https://doi.org/10.5194/acp-19-9351-2019
https://doi.org/10.5194/acp-19-9351-2019
Research article
 | 
22 Jul 2019
Research article |  | 22 Jul 2019

Modeling of aerosol property evolution during winter haze episodes over a megacity cluster in northern China: roles of regional transport and heterogeneous reactions of SO2

Huiyun Du, Jie Li, Xueshun Chen, Zifa Wang, Yele Sun, Pingqing Fu, Jianjun Li, Jian Gao, and Ying Wei

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Jie Li on behalf of the Authors (13 Apr 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (18 Apr 2019) by James Allan
RR by Anonymous Referee #1 (19 Apr 2019)
RR by Anonymous Referee #2 (25 Apr 2019)
ED: Publish subject to minor revisions (review by editor) (26 Apr 2019) by James Allan
AR by Jie Li on behalf of the Authors (06 May 2019)  Author's response    Manuscript
ED: Publish as is (08 May 2019) by James Allan
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Short summary
Regional transport and heterogeneous reactions play crucial roles in haze formation. Using a chemical transport model, we found that chemical transformation of SO2 along the transport pathway from source regions to Beijing was the major source of sulfate. Heterogeneous chemistry had a stronger effect under high humidity and high pollution levels. Aerosols underwent aging during transport which altered the aerosol size and the degree of aging.
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