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Kinetic Study of the OH‐isoprene and O 3 ‐isoprene reaction in the atmosphere simulation chamber, SAPHIR
Author(s) -
Karl M.,
Brauers Th.,
Dorn H.P.,
Holland F.,
Komenda M.,
Poppe D.,
Rohrer F.,
Rupp L.,
Schaub A.,
Wahner A.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl019189
Subject(s) - isoprene , atmosphere (unit) , kinetic energy , chemistry , atmospheric chemistry , analytical chemistry (journal) , photochemistry , ozone , thermodynamics , environmental chemistry , organic chemistry , physics , copolymer , polymer , quantum mechanics
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.