The effect of winds on the ionospheric F2-peak--II

Physics

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Scientific paper

An approximate method of calculation (, 1967) is used to investigate further the effects of meridional winds in the neutral air on the ionospheric F2-peak. The wind speeds are taken from new time-varying calculations by (1967a). Over a range of latitudes, the winds produce a morning maximum of peak electron density NmF2 followed by a rapid afternoon decrease, which does not resemble observed F2-layer behaviour. No seasonal anomaly of NmF2 is found. The winds can qualitatively account for observed day-to-night changes, of order 100 km, in the height hmF2 of the peak. At night, in the presence of winds, NmF2 can be maintained at between 104 and 105 cm-3 by a physically reasonable influx (107 cm-2 sec-1) of ionization from the protonosphere.

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