Differences in regular and storm time ionospheric variability at magnetically conjugated locations of the Northern and Southern Hemisphere

0542502 - ÚFA 2022 DE eng A - Abstrakt
Burešová, Dalia - Habarulema, J. B. - Araujo-Pradere, E. - Tshisaphungo, M. - Watermann, J. - Laštovička, Jan
Differences in regular and storm time ionospheric variability at magnetically conjugated locations of the Northern and Southern Hemisphere.
EGU General Assembly 2021 (vEGU21: Gather Online). Göttingen: European Geosciences Union, 2021.
[EGU General Assembly Conference 2021. 19.04.2021-30.04.2021, online]
Institucionální podpora: RVO:68378289
Klíčová slova: ionospheric storms * magnetic storms * Large Scale Traveling Ionospheric Disturbances (LSTIDs)
Obor OECD: Meteorology and atmospheric sciences
https://meetingorganizer.copernicus.org/EGU21/EGU21-4611.html

The paper is focused on differences/similarities in regular daily ionospheric variability and in the ionospheric response to CME- and CIR/CHSS-related magnetic disturbances above magnetically conjugated ionospheric stations located at Northern and Southern Hemisphere. We analysed variability of critical frequency foF2 and the F2 layer peak height hmF2 obtained for European-African sector for initial, main and recovery phases of magnetic storms of different intensity, which occurred within the last two solar cycles. We also used exclusively GPS-based detection methods, specifically information on TEC, TEC deviations in space and time from a background reference (dTEC), and the Rate of TEC change in time (ROT), all inferred from GPS receiver networks in Europe and Africa to compare behavior of Large Scale Traveling Ionospheric Disturbances (LSTIDs) at both hemispheres. We conclude that hemispheric conjugacy of LSTID is highly probable during both CME- and CIR/CHSS-related storms while interhemispheric circulation rather unlikely but still occurring during some periods.
Trvalý link: http://hdl.handle.net/11104/0319900