TWO TYPES OF IONOSPHERIC STORMS,
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER WASHINGTON D C
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Phenomena observed in the ionosphere at the time of magnetic disturbances are discussed. On the basis of the material on ionospheric observations collected over a period of ten years 1946-1955 in the Tiksi bay, located near the zone of maximum auroral frequency, it is demonstrated that the relationship between the disturbances in the upper layers of the ionosphere lowering of f sub o F2, and those in the lower layers anomalous absorption vary substantially from storm to storm. It was possible to isolate two types of storms F-type storms, for which no noticeable increase of anomalous absorption is observed in the auroral zone in the presence of strong disturbances in the F2 layer, and the FD-type storms, in which a substantial increase of anomalous absorption was observed simultaneously with a decrease in f sub o F2.
- Atmospheric Physics