Splitting of atomic oxygen height profiles by eddy diffusion

Details Splitting of atomic oxygen height profiles by eddy diffusion Splitting of atomic oxygen height profiles by eddy diffusion

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55.1361v&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 10, p. 1361-1363.

Computer Science

Sound

4

Atom Concentration, Oxygen Atoms, Turbulent Diffusion, Upper Atmosphere, Diffusion Coefficient, Rocket Sounding, Vertical Distribution

Scientific paper

A time-dependent model of upper atmospheric composition has been used to explain the splitting of the atomic oxygen concentration height profile into two maxima. The major feature of this model is multicomponent molecular diffusion. This model of the major constituents makes it possible to obtain the wave height profiles of the atomic oxygen as a result of the smooth eddy diffusion, multicomponent molecular diffusion and photochemistry. The position of maxima of the split profiles depends very strongly on the gradient of the eddy diffusion coefficient above its maximum. The depth of the splitting increases with the gradient increase, but the splitting does not depend on the maximum value of the eddy diffusion coefficient itself. It is important to note that, in this case, the atomic oxygen concentration may be varied by a factor of 2 in the thermosphere due only to the variation of the eddy diffusion coefficient gradient above the maximum. The splitting of the atomic oxygen height profiles is reflected in the height profiles of the Herzberg band and also of the green line emissions which are a result of atomic oxygen three-body recombination.

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