The fate of vibrationally excited hydroxyl radicals, HO /v less than 9/, in the stratosphere

Details The fate of vibrationally excited hydroxyl radicals, HO /v less than 9/, in the stratosphere The fate of vibrationally excited hydroxyl radicals, HO /v less than 9/, in the stratosphere

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..521s&link_type=abstract

Geophysical Research Letters, vol. 3, Sept. 1976, p. 521-523. ERDA-supported research.

Physics

1

Atmospheric Composition, Hydroxyl Radicals, Molecular Excitation, Stratosphere, Vibrational Spectra, Atmospheric Chemistry, Atmospheric Circulation, Atmospheric Models, Photochemical Reactions, Reaction Kinetics

Scientific paper

The method of instantaneous rates reported by Johnston and Whitten (1975) is used to model the behavior of HO(v) in the stratosphere. The method employs the observed distributions of atmospheric species, which were set up by natural atmospheric motions and photochemistry; the method is capable of calculating the instantaneous rates of photochemical reactions, irrespective of atmospheric motions. In addition, the total ozone column is calculated as a basis for comparison of different HO(v) production models. It is shown that the very rapid quenching of vibrationally excited hydroxyl radicals precludes them from contributing significantly to the chemistry of the atmosphere up to 48 km. Due to low steady-state concentrations of HO(v), rate constants for HO(v) reactions would need to be several orders of magnitude larger than expected for excited hydroxyls to be important in the stratosphere. The lifetime and hence importance of vibrationally excited hydroxyl radicals would be much greater in the mesosphere.

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