Modelling of the electron density profile in the lowest part of ionosphere D-region on the basis of radiowave absorption data. 2. Seasonal variations.

Details Modelling of the electron density profile in the lowest part of ionosphere D-region on the basis of radiowave absorption data. 2. Seasonal variations. Modelling of the electron density profile in the lowest part of ionosphere D-region on the basis of radiowave absorption data. 2. Seasonal variations.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jatp...58.1729m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, Vol. 58, No. 15, p. 1729 - 1734

Physics

Earth Ionosphere: Models, Earth Ionosphere: D Region, Earth Ionosphere: Variations

Scientific paper

A new model of the lowest part of the D-region is obtained by a trial-and-error inversion method. Its basic feature is a step-like transition between 55 and 70 km which is not depicted in most ionospheric models. The seasonal differences of this are considered to be quite important: the bottom of the ionosphere is found to be lower in boreal summer and spring, the gradient of the profile below the cosmic-ray generated layer is stronger in winter, and a well defined "valley" exists around 70 km in spring. By simulating the ionospheric response to a solar flare (SID-effect) in summer and in winter, an attempt was made to verify the obtained seasonal peculiarities of the quiet ionosphere.

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