The atmospheric neutral sodium layer. II - Diurnal variations

Details The atmospheric neutral sodium layer. II - Diurnal variations The atmospheric neutral sodium layer. II - Diurnal variations

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88..442k&link_type=abstract

Journal of Geophysical Research, vol. 88, Jan. 1, 1983, p. 442-450. Financiadora de Estudos e Projetos No. CT/537.

Physics

15

Atmospheric Chemistry, Atmospheric Composition, Atmospheric Density, Diurnal Variations, Nightglow, Sodium, Atmospheric Models, Neutral Atoms, Photochemical Reactions, Reaction Kinetics, Sodium Hydroxides, Turbulent Diffusion

Scientific paper

A dynamic time-dependent atmospheric photochemistry-vertical diffusion model is developed to calculate the diurnal variation of sodium, and the results are compared with experimental measurements and static calculations which simulate the nocturnal sodium layer. The results of the diurnal calculations show that the sodium layer model fails to reproduce the measured diurnal behavior of the sodium layer. The inaccuracies of the model are further increased if the reaction NaO2 plus O yields NaO plus O2 is included. It is shown that the accuracy of the sodium layer model can be greatly increased by eliminating the reaction NaOH plus H yields Na plus H2O. The production of the NaOH molecule is thus effectively transformed into a height dependent sink for sodium. The sensitivity of the modified model is tested for variations of the reaction rates and the eddy diffusion coefficients, and the results are shown to be in much better agreement with the experimental values.

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