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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 12
Ann. Geophys., 16, 1527–1533, 1998
https://doi.org/10.1007/s00585-998-1527-2
© European Geosciences Union 1998
Ann. Geophys., 16, 1527–1533, 1998
https://doi.org/10.1007/s00585-998-1527-2
© European Geosciences Union 1998

  31 Dec 1998

31 Dec 1998

Solar activity effects in the ionospheric D region

A. D. Danilov A. D. Danilov
  • Institute of Applied Geophysics, Rostokinskaya 9, Moscow 128 129, Russia Fax: + 7 095 187 75 13; e-mail: geophys@sovam.com

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.

Key words. Atmospheric composition and structure · Ion chemistry of the atmosphere · Middle atmosphere

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