Computer Science
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1469f&link_type=abstract
Planetary and Space Science, vol. 27, Dec. 1979, p. 1469-1477.
Computer Science
3
Atmospheric Chemistry, Atmospheric Composition, Gravity Waves, Photochemical Reactions, Thermosphere, Airglow, Hydroxyl Radicals, Ozone, Temperature Distribution
Scientific paper
The wind and temperature oscillations of internal gravity waves can cause horizontal variations of a factor of two in minor gas number densities in the lower thermosphere over length scales of several hundred kilometers. The variations are due both to vertical transport of constituents whose lifetimes are long compared to the wave period and to chemical activity driven by temperature dependent reaction rate coefficients. The nightglow emission of the hydroxyl radical provides a remote sensor of wave activity between 80 and 90 km. Theoretical calculations show that the horizontal variations in the atomic hydrogen distribution are the largest single contributor to wave structure in the nightglow followed by the effects of temperature fluctuations on the rate coefficient of the reaction H + O3 yields O2 + OH (nu prime is greater than 0).
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