Ionospheric changes in response to IMF variations

摘要: Abstract This paper attempts to summarize the results of investigations IMF effects on ionosphere, published mostly in Russian, and place them context up-to-date knowledge IMF/magnetosphere/ionosphere relationships. Effects sector structure B z component turnings ionospheric F-layer are considered, including variations position main trough (MIT). The includes both theoretical calculations observational data obtained by Cosmos-900, Intercosmos-19 Cosmos-1809 satellites at subauroral, middle low latitudes. MIT dependence longitude has been derived as a background for further study. It shown that nightside winter storm growth phase correlates best with K P index taken time delay τ, which is proportional disturbance rate ΔK p / Δt . D st , y also shown. Two troughs have found be formed usually recovery postmidnight hours: these (main trough) RIT (ring associated DR-current. In general position's response southward corresponds well changes amoral diffuse precipitation equatorial edge. For height night-time lowers, latitudes f o F 2 decreases sharply, latter effect being most pronounced 03 LT. Large-scale internal gravity waves arriving from auroral oval cause intensification anomaly, daytime night-time. A schematic pattern global magnetic constructed using an example strong 3–4 April 1979.