Podrobnosti záznamu

    Ionospheric disturbances under low solar activity conditions
    Bochníček, Josef
    Burešová, Dalia
    Hejda, Pavel
    Laštovička, Jan
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Advances in Space Research
    Roč. 54, č. 2
    s. 185-196
    Projekt: GAP209/11/1908, GA ČR, CZ3cav_un_auth*0273570
    Rozsah: 12 s.
Předmětová kategorie
    ionospheric variability
    magnetic storms
    solar minimum
Klíčové slovo
Abstrakt (anglicky)
   The paper is focused on ionospheric response to occasional magnetic disturbances above selected ionospheric stations located at middle latitudes of the Northern and Southern Hemisphere under extremely low solar activity conditions of 2007-2009. We analyzed changes in the F2 layer critical frequency foF2 and the F2 layer peak height hmF2 against 27-days running mean obtained for different longitudinal sectors of both hemispheres for the initial, main and recovery phases of selected magnetic disturbances. Our analysis showed that the effects on the middle latitude ionosphere of weak-to-moderate CIR-related magnetic storms, which mostly occur around solar minimum period, could be comparable with the effects of strong magnetic storms. In general, both positive and negative deviations of foF2 and hmF2 have been observed independent on season and location. However positive effects on foF2 prevailed and were more significant.
   Observations of stormy ionosphere also showed large departures from the climatology within storm recovery phase, which are comparable with those usually observed during the storm main phase. The IRI STORM model gave no reliable corrections of foF2 for analyzed events.
    AV ČR Brno, Geofyzikální ústav
Kód přispěvatele
    AV ČR, GFÚ
Zdrojový formát
Datum importu
    23. 10. 2014