Abstract
Previous calculations of steady-state electron density distributions in the equatorial ionosphere are extended to study the effect of variations in the electromagnetic drift velocity. It is found that a very small downward drift is sufficient to destroy the equatorial anomaly. The effects of meridional winds in producing distributions which are asymmetrical about the Equator are studied, and from a comparison with experimental data it is suggested that such winds can well account for the asymmetrical distributions found at the solstices. The effects of asymmetrical photoionization and heating of the neutral air are insufficient to explain these solstice results.
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