An oxygen-hydrogen atmospheric model and its application to the OH emission problem

Details An oxygen-hydrogen atmospheric model and its application to the OH emission problem An oxygen-hydrogen atmospheric model and its application to the OH emission problem

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39..551m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 39, May 1977, p. 551-570. Research supported by the Centre National d'Etud

Physics

10

Atmospheric Models, Hydrogen, Hydroxyl Emission, Mesosphere, Oxygen, Photochemical Reactions, Atmospheric Chemistry, Atmospheric Composition, Dayglow, Diffusion Coefficient, Ozone, Turbulent Diffusion

Scientific paper

A time-dependent mesospheric model has been developed as an aid to the quantitative description of the main features of OH emission. The model includes an oxygen-hydrogen photochemical scheme described in detail, and uses a height-dependent vertical eddy diffusion coefficient in the analysis of vertical transport processes. Different excited OH vibrational levels, assumed to be produced preferentially in the upper levels by the hydrogen-ozone reaction, are taken into account. The model predicts several characteristics of the observed emission, including the rapid intensity decrease before sunrise, the midday maximum (comparable to the nighttime value), and the evening minimum following sunset. Reasons for the model's inability to predict the generally erratic OH nightglow intensity variations are discussed. Height profiles of OH(plus) are examined, and it is suggested that profile data would aid in deciding between alternative quenching schemes.

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