Solar flare and IMF sector structure effects in the lower ionosphere
About 1% of all sudden ionospheric disturbances (SIDs) observed at the Panska Ves Observatory (Czechoslovakia), were found to be not of solar-XUV origin. Among them, the very rare SWF events (observed at L 2.4) of corpuscular origin are the most interesting. The IMF sector structure effects in the midlatitude lower ionosphere are minor in comparison with effects of solar flares, geomagnetic storms, etc. There are two basic types of effects. The first type is a disturbance, best developed in geomagnetic activity, and observed in the night-time ionosphere. It can be interpreted as a response to sector structure related changes of geomagnetic (magnetospheric) activity. The other type is best developed in the tropospheric vorticity area index and is also observed in the day-time ionosphere in winter. This effect is quietening in the ionosphere as well as troposphere. While the occurrence of the former type is persistent in time, the latter is severely diminished in some periods. All the stratosphere, the 10-mb level temperature and height above Berlin-Tempelhof do not display any observable IMF section structure effect.
- Research Organization:
- Ceskoslovenska Akademie Ved, Prague
- OSTI ID:
- 5672389
- Report Number(s):
- N-85-20486
- Resource Relation:
- Other Information: In International Council of Scientific Unions, middle atmosphere program: handbook for map, Vol. 10, 193-199 p., (N--85-20450 11-42)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
SOLAR FLARES
IONOSPHERIC EFFECTS
SUDDEN IONOSPHERIC DISTURBANCE
BOUNDARY LAYERS
EXTREME ULTRAVIOLET RADIATION
MAGNETIC STORMS
SOLAR WIND
DISTURBANCES
ELECTROMAGNETIC RADIATION
IONOSPHERIC STORMS
LAYERS
RADIATIONS
SOLAR ACTIVITY
ULTRAVIOLET RADIATION
640104* - Astrophysics & Cosmology- Solar Phenomena
640201 - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena