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| Titel |
Implications of the O + OH reaction in hydroxyl nightglow modeling |
| VerfasserIn |
P. J. S. B. Caridade, J.-Z. J. Horta, A. J. C. Varandas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 1 ; Nr. 13, no. 1 (2013-01-02), S.1-13 |
| Datensatznummer |
250011711
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| Publikation (Nr.) |
 copernicus.org/acp-13-1-2013.pdf |
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| Zusammenfassung |
| The hydroxyl nightglow has been examined anew using calculated rate
constants for the key reactive and inelastic O + OH(v')
quenching processes. These constants have been obtained from
quasiclassical trajectories run on the adiabatic ab initio-based
double many-body expansion-IV potential energy surface for the ground
state of the hydroperoxil radical. Significant differences in the
vertical profiles of vibrationally excited hydroxyl radicals are
obtained relative to the ones predicted by Adler-Golden (1997) when
employing an O + OH(v') effective rate constant chosen to
be twice the experimental value for quenching of OH(v' = 1). At
an altitude of 90 km, such deviations range from ~ 80% for
v' = 1 to only a few percent for v' = 9. Other mechanisms
reported in the literature have also been utilized, in particular
those that loosely yield lower and upper limits in the results, namely
sudden-death and collisional cascade. Finally, the validity of the
steady-state hypothesis is analysed through comparison with results
obtained via numerical integration of the master equations. |
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