Articles | Volume 16, issue 17
https://doi.org/10.5194/acp-16-11237-2016
https://doi.org/10.5194/acp-16-11237-2016
Research article
 | 
12 Sep 2016
Research article |  | 12 Sep 2016

Impact of NOx and OH on secondary organic aerosol formation from β-pinene photooxidation

Mehrnaz Sarrafzadeh, Jürgen Wildt, Iida Pullinen, Monika Springer, Einhard Kleist, Ralf Tillmann, Sebastian H. Schmitt, Cheng Wu, Thomas F. Mentel, Defeng Zhao, Donald R. Hastie, and Astrid Kiendler-Scharr

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AR by Jürgen Wildt on behalf of the Authors (19 Jul 2016)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (01 Aug 2016) by Nga Lee Ng
RR by Anonymous Referee #2 (13 Aug 2016)
ED: Publish subject to technical corrections (18 Aug 2016) by Nga Lee Ng
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Short summary
We investigated NOx impacts on the formation of secondary organic aerosol (SOA) mass from b-pinene and we could reveal two different mechanisms of impacts. One of them was the impact of NOx on OH that could explain increasing SOA yield with increasing NOx at low NOx conditions. The other was the suppression of new particle formation limiting the condensational sink for the SOA precursors. This effect could explain a substantial fraction of the decrease of SOA yield observed at high NOx.
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