Physics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1187s&link_type=abstract
Geophysical Research Letters, vol. 9, Oct. 1982, p. 1187-1190. Research supported by the Chemical Manufacturers Association;
Physics
28
Atmospheric Chemistry, Mesosphere, Reaction Kinetics, Reduction (Chemistry), Sodium Compounds, Atmospheric Models, Diurnal Variations, Metal Oxides, Photolysis, Sodium Hydroxides
Scientific paper
The sodium layer in the mesosphere has been the subject of many studies because of the intense emission of the Na D line at 5893 A. In the model reported by Liu and Reid (1979) Na is dominant above 90 km and NaOH below 85 km. The present investigation is concerned with the role of reaction NaO2 + O yields NaO + O2 (6) in atmospheric sodium chemistry. Recent measurements are found to indicate that the rate coefficient for Na + O2 + M yields NAO2 + M is three orders of magnitude faster than previously reported. Use of this new rate coefficient in current models will lead to Na concentrations in the upper mesosphere significantly lower than the observations. It is proposed that the restoration of the proper Na concentrations necessitates the reduction of NaO2 by O, particularly at night when photolysis of NaOH or NaO2 become ineffective Na sources.
Ko Malcolm K. W.
Murad Edmond
Swider William
Sze Nien-Dak
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