Kinetic Study of the OH‐isoprene and O 3 ‐isoprene reaction in the atmosphere simulation chamber, SAPHIR

Kinetic studies conducted in the new atmosphere simulation chamber SAPHIR at the Research Center Jülich allow a thorough investigation of oxidation of isoprene induced by O 3 and the OH radical under atmospheric conditions. Rate coefficients for the O 3 ‐isoprene and OH‐isoprene reaction are determi...

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Bibliographic Details
Published in:Geophysical research letters 2004-03, Vol.31 (5)
Main Authors: Karl, M., Brauers, Th, Dorn, H.‐P., Holland, F., Komenda, M., Poppe, D., Rohrer, F., Rupp, L., Schaub, A., Wahner, A.
Format: Article
Language:English
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Summary:Kinetic studies conducted in the new atmosphere simulation chamber SAPHIR at the Research Center Jülich allow a thorough investigation of oxidation of isoprene induced by O 3 and the OH radical under atmospheric conditions. Rate coefficients for the O 3 ‐isoprene and OH‐isoprene reaction are determined from measured concentration‐time profiles. For the reaction of O 3 with isoprene the rate coefficient is determined to be (9.6 ± 0.7) × 10 −18 cm 3 molecule −1 s −1 at 286 K . The rate coefficient for the reaction OH + isoprene is (10.0 ± 1.2) × 10 −11 cm 3 molecule −1 s −1 at 294 K . The kinetic parameters determined in SAPHIR at atmospheric concentrations agree well with recent recommendations.
ISSN:0094-8276
1944-8007
DOI:10.1029/2003GL019189