Importance of isomerization reactions for OH radical regeneration from the photo-oxidation of isoprene  investigated in the atmospheric simulation chamber SAPHIR

Novelli, Anna; Vereecken, Luc; Bohn, Birger; Dorn, Hans-Peter; Gkatzelis, Georgios I.; Hofzumahaus, Andreas; Holland, Frank; Reimer, David; Rohrer, Franz; Rosanka, Simon; Taraborrelli, Domenico; Tillmann, Ralf; Wegener, Robert; Yu, Zhujun; Kiendler-Scharr, Astrid; Wahner, Andreas; Fuchs, Hendrik

doi:https://doi.org/10.5194/acp-20-3333-2020

Articles | Volume 20, issue 6

https://doi.org/10.5194/acp-20-3333-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

https://doi.org/10.5194/acp-20-3333-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 6

Research article

|

20 Mar 2020

Research article |

| 20 Mar 2020

Importance of isomerization reactions for OH radical regeneration from the photo-oxidation of isoprene investigated in the atmospheric simulation chamber SAPHIR

Anna Novelli, Luc Vereecken, Birger Bohn, Hans-Peter Dorn, Georgios I. Gkatzelis, Andreas Hofzumahaus, Frank Holland, David Reimer, Franz Rohrer, Simon Rosanka, Domenico Taraborrelli, Ralf Tillmann, Robert Wegener, Zhujun Yu, Astrid Kiendler-Scharr, Andreas Wahner, and Hendrik Fuchs

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RC1: 'Review of "Importance of isomerization reactions for the OH radical regeneration..." by Novelli et al.', Anonymous Referee #2, 12 Nov 2019
RC2: 'Review of “Importance of isomerization reactions for the OH radical regeneration from the photo-oxidation of isoprene investigated in the atmospheric simulation chamber SAPHIR” by Novelli et al.', Anonymous Referee #3, 25 Nov 2019
AC1: 'Authors answers to the referees', Anna Novelli, 10 Feb 2020

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AR: Author's response | RR: Referee report | ED: Editor decision

AR by Anna Novelli on behalf of the Authors (10 Feb 2020) Author's response Manuscript

ED: Publish as is (16 Feb 2020) by Dwayne Heard

AR by Anna Novelli on behalf of the Authors (17 Feb 2020)

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Short summary

Experimental evidence from a simulation chamber study shows that the regeneration efficiency of the hydroxyl radical is maintained globally at values higher than 0.5 for a wide range of nitrogen oxide concentrations as a result of isomerizations of peroxy radicals originating from the OH oxidation of isoprene. The available models were tested, and suggestions on how to improve their ability to reproduce the measured radical and oxygenated volatile organic compound concentrations are provided.