Solar activity eects in the ionospheric D region*
نویسنده
چکیده
Variations in the D-region electron concentration within the solar activity cycle are considered. It is demonstrated that conclusions of various authors, who have analyzed various sets of experimental data on [e], dier signi®cantly. The most reliable seem to be the conclusions based on analysis of the [e] measurements carried out by the Faraday rotation method and on the theoretical concepts on the D-region photochemistry. Possible QBO eects in the relation of [e] to solar activity are considered and an assumption is made that such eects may be the reason for the aforementioned disagreement in conclusions on the [e] relation to solar indices.
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