Variations of transport conditions and winter anomaly in the D-ionospheric region

Details Variations of transport conditions and winter anomaly in the D-ionospheric region Variations of transport conditions and winter anomaly in the D-ionospheric region

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jatp...41..431k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 41, May 1979, p. 431-438.

Mathematics

2

Charged Particles, D Region, Neutral Particles, Transport Properties, Turbulent Diffusion, Vertical Distribution, Absorption Cross Sections, Anomalies, Atmospheric Circulation, Differential Equations, Ion Density (Concentration), Ionization Cross Sections, Nitric Oxide, Nitrogen Dioxide, Positive Ions, Transformations (Mathematics), Winter

Scientific paper

The system of differential equations, describing the behavior of the concentrations of minor neutral constituents and charged particles within the height range 30-150 km have been numerically solved and the effect of variations in the turbulent diffusion coefficient upon the ion structure of D-region evaluated. Two cases have been analyzed. In the first complete mixing of the atmosphere is assumed to 90 km. In the second the effect of rapid transport through the 95-105 km region is considered. In the latter case the concentration of nitric oxide is increased compared with the first in the height interval 70-100 km, i.e., at those altitudes where the winter anomaly phenomenon is localized. The maximum excess is about 19 times. The distribution of concentrations of charged particles in the second case is also in agreement with values observed experimentally during the winter anomaly period.

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