Abstract
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], differ significantly. 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 effects in the relation of [e] to solar activity are considered and an assumption is made that such effects may be the reason for the aforementioned disagreement in conclusions on the [e] relation to solar indices.
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Danilov, A.D. Solar activity effects in the ionospheric D region. Annales Geophysicae 16, 1527–1533 (1998). https://doi.org/10.1007/s00585-998-1527-2
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DOI: https://doi.org/10.1007/s00585-998-1527-2