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| Titel |
Global morphology of night-time NmF2 enhancements |
| VerfasserIn |
A. F. Farelo, M. Herraiz, A. V. Mikhailov |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 20, no. 11 ; Nr. 20, no. 11, S.1795-1806 |
| Datensatznummer |
250014494
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| Publikation (Nr.) |
 copernicus.org/angeo-20-1795-2002.pdf |
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| Zusammenfassung |
An overall statistical
study of night-time enhancements of NmF2 has been carried out. All
available foF2 observations since 1955 at 53 ionosonde stations
distributed worldwide in the latitude range fgeom
= 15° - 60° were used in the analysis. More than 200 000 station-nights of
data were analysed. This large data base allowed us to study seasonal, solar
cycle and spatial variations of the NmF2 nighttime enhancements. Both
pre-midnight and post-midnight NmF2 peaks demonstrate distinct
variations with geophysical conditions, indicating different physical
mechanisms responsible for their formation.
Key words. Ionosphere (mid-latitude ionosphere,
ionosphere-magnetosphere interactions) Radio science (ionospheric
physics) |
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