Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..321k&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, April 1984, p. 321-333. Research supported by the Univ
Physics
3
Atmospheric Composition, D Region, Nitric Oxide, Planetary Waves, Dynamic Models, Ionospheric Electron Density, Oxygen Atoms, Vertical Distribution, Wave Propagation
Scientific paper
Dynamical influences of planetary waves on nitric oxide (NO) variations in the D-region have been theoretically investigated on the basis of a simplified dynamical and chemical model. An investigation has been made of NO changes induced by stationary planetary waves, the structures of which are calculated in a zonal wind at 45 deg N in January. It is found that a vertically propagating wave of wavenumber 1 could cause downward flux of NO above 85 km and upward below that level. The wave could also cause downward flux of atomic oxygen (O) in the lower thermosphere above 90 km. These fluxes are adequate to account for the increase in D-region ionization sources such as NO and O2(1 Delta g). The vertical flux convergence has been estimated and found to be large enough to produce one order of enhancement in NO concentration during a period of a few days when the wave forcing at the 10 mb level (about 30 km) has an amplitude of about 300 geopotential meters.
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