Solar activity variation of nitric oxide in the E-region and its implications

Details Solar activity variation of nitric oxide in the E-region and its implications Solar activity variation of nitric oxide in the E-region and its implications

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40...81c&link_type=abstract

(COSPAR, Symposium on Minor Constituents and Excited Species, Philadelphia, Pa., June 1976.) Journal of Atmospheric and Terrestr

Physics

2

Atmospheric Composition, E Region, Nitric Oxide, Reaction Kinetics, Solar Activity Effects, Atmospheric Chemistry, Concentration (Composition), Gas Dissociation, Ion Production Rates, Ionospheric Electron Density, Photoionization, Solar Terrestrial Interactions

Scientific paper

Studies are made of the solar activity variation of nitric oxide density in the 90-130 km range for the mid-latitude daytime condition. The studies are based on the presently known ion-neutral chemistry of odd nitrogens, laboratory-measured reaction rates, and transport mechanisms caused by eddy and molecular diffusions. Three model combinations having different N(2D) yields are considered. It is found that below 100 km, all models show increased nitric-oxide density (by factors of 3 to 4) with solar activity. Above 100 km, two models show an increase in NO density (by factors of 3 to 4) with solar activity while the third shows negligible variation. All models yield good results for observed electron densities, although none explains the NO(+)/O2(+) concentration ratio and its variation with solar activity.

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