Articles | Volume 18, issue 17
https://doi.org/10.5194/acp-18-13231-2018
https://doi.org/10.5194/acp-18-13231-2018
Research article
 | 
13 Sep 2018
Research article |  | 13 Sep 2018

The role of H2SO4-NH3 anion clusters in ion-induced aerosol nucleation mechanisms in the boreal forest

Chao Yan, Lubna Dada, Clémence Rose, Tuija Jokinen, Wei Nie, Siegfried Schobesberger, Heikki Junninen, Katrianne Lehtipalo, Nina Sarnela, Ulla Makkonen, Olga Garmash, Yonghong Wang, Qiaozhi Zha, Pauli Paasonen, Federico Bianchi, Mikko Sipilä, Mikael Ehn, Tuukka Petäjä, Veli-Matti Kerminen, Douglas R. Worsnop, and Markku Kulmala

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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 Chao Yan on behalf of the Authors (02 Jul 2018)  Author's response 
ED: Referee Nomination & Report Request started (05 Jul 2018) by Gordon McFiggans
RR by Anonymous Referee #2 (18 Jul 2018)
ED: Reconsider after major revisions (03 Aug 2018) by Gordon McFiggans
AR by Chao Yan on behalf of the Authors (11 Aug 2018)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (15 Aug 2018) by Gordon McFiggans
RR by Anonymous Referee #2 (22 Aug 2018)
ED: Publish as is (22 Aug 2018) by Gordon McFiggans
AR by Chao Yan on behalf of the Authors (26 Aug 2018)  Manuscript 
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Short summary
Ions can play an important role in atmospheric new particle formation by stabilizing the embryonic clusters. Such a process is called ion-induced nucleation (IIN). We found two distinct IIN mechanisms – driven by H2SO4-NH3 clusters and by organic vapors, respectively. The concentration ratio of organic vapors to H2SO4 regulates via which pathway the IIN occur. As the organic vapor concentration is influenced by temperature, a seasonal variation in the main IIN mechanism can be expected.
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