期刊
ATMOSPHERIC CHEMISTRY AND PHYSICS
卷 13, 期 1, 页码 1-13出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/acp-13-1-2013
关键词
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资金
- III (UC)
- FEDER through Programa Operacional Factores de Competitividade - COMPETE
- national funds under the auspices of Fundacao para a Ciencia e a Tecnologia, Portugal [PTDC/QUI-QUI/099744/2008, PTDC/AAC-AMB/099737/2008]
- Fundação para a Ciência e a Tecnologia [PTDC/QUI-QUI/099744/2008, PTDC/AAC-AMB/099737/2008] Funding Source: FCT
- Office of Polar Programs (OPP)
- Directorate For Geosciences [0944537] Funding Source: National Science Foundation
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 similar to 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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