Physics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ge%26ae..15.1000d&link_type=abstract
Geomagnetizm i Aeronomiia, vol. 15, Nov.-Dec. 1975, p. 1000-1004. In Russian.
Physics
2
D Region, Ion Recombination, Ionospheric Ion Density, Recombination Coefficient, Atmospheric Ionization, Electron Density (Concentration), Photochemical Reactions
Scientific paper
The effect of changes in the positive ion content of the D region on the effective recombination coefficient is investigated. Experimental measurements of the ion content at 80 and 85 km show that the electron concentration is proportional to the rate of ion formation for electron concentrations not in excess of 10,000/cu cm. The effective recombination coefficient decreases with increasing electron concentration or increasing rate of ion formation. The photochemical model proposed by Danilov (1975) for the transformation of positive ions is in good agreement with these results for electron concentrations above 300/cu cm. At low electron concentrations there is poor agreement between theories considering only positive ions and experiment. The discrepancies indicate the appearance of significant concentrations of negative ions under certain conditions (twilight, night, solar eclipse) and may possibly be used to determine these concentrations.
Danilov Aleksei Dmitrievich
Simonov A. G.
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