TITLE:
The Effects of the Recurrent Storms on Fof2 at Ouagadougou Station during Solar Cycles 21-22
AUTHORS:
Wambi Emmanuel Sawadogo, Frédéric Ouattara, Mahammat Nour Ali
KEYWORDS:
Solar Wind High Speed Stream, Recurrent Activity, F2 Layer Critical Frequency, Solar Cycle Phases, Positive Storms
JOURNAL NAME:
International Journal of Geosciences,
Vol.10 No.1,
January
31,
2019
ABSTRACT: The present paper deals with the effect of recurrent activity on the foF2 diurnal variation at Ouagadougou station for solar cycles 21 and 22. The recurrent activity produces at daytime positive storm for all solar cycle phases. For all seasons, the recurrent activity causes positive storm during nighttime and has no effect during daytime. From this study, it emerges that a positive effect of the storm at this station may be explained by the thermospheric composition changes. Recurrent activity more occurs during the solar decreasing phase and during
spring month. The storm strength shows solar cycle phase and seasonal dependence. The storm strength is the highest during the solar increasing phase and during summer months.