Variability of mid-latitude ionospheric foF2 compared to IMF-polarity inversions

Details Variability of mid-latitude ionospheric foF2 compared to IMF-polarity inversions Variability of mid-latitude ionospheric foF2 compared to IMF-polarity inversions

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15...35t&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 2, p. 35-44

Physics

2

F 2 Region, Interplanetary Magnetic Fields, Magnetic Poles, Polarity, Variability, Annual Variations, Critical Frequencies, Diurnal Variations, Frequency Distribution, Ionosondes, Solar Cycles

Scientific paper

Potential effects of the Interplanetary Magnetic Field (IMF)-orientation on the mid-latitude ionosphere are further investigated using critical frequencies foF2 from six ionosonde stations. For a period of 15 days around each inversion of B(sub Z), excluding all days with Ap greater than or = 6, a quiet standard diurnal variation was determined by day-by-day averaging for each hour universal time (UT). The regular diurnal, seasonal and solar cycle variations were then removed from the data by substracting from these the quiet standard value. The so obtained differences delta-foF2 were sorted after the IMF polarity. Distinct effects of northward and southward inversions were found so that a large part of the day-to day variability may be attributed to IMF B(sub Z) polarity changes.

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