North-South Asymmetry of the Ionosphere Perturbations at the Degrading Trend of Geomagnetic Activity

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Authors

Tamara Gulyaeva¹ , Haris Haralambous²

1. IZMIRAN, Moscow, Russia
2. Frederick Research Center, Nicosia, Cyprus

Conference / event

2nd Eddy Cross Disciplinary Symposium, June 2021 (Boulder, CO, United States)

Poster summary

A retrospective study of the ionosphere perturbation indices WUf, WLf, and WEf of the critical frequency foF2 at Moscow, Slough-Chilton, Canberra, and Port Stanley stations from 1945 to 2020 shows asymmetry in the trends in the Northern and Southern hemispheres: the decline of the 3h indices at Moscow and Slough-Chilton and the growth of the ionosphere disturbances in Canberra and Port Stanley. The phenomenon of the North-South asymmetry has been earlier observed with the different space environment characteristics. At the same time, a clear decreasing trend of the geomagnetic activity of Kp, Ap, aa and Dst indices is observed during the recent solar cycles. The difference in the changes of the indices of geomagnetic and ionospheric activity suggests the independent character of these two types of geophysical fields and a presence of other sources of ionospheric activity in addition to the sources of variability of the magnetosphere.

Keywords

Space weather, Ionosphere disturbances, Geomagnetic activity

Research areas

Aeronautics and Aerospace Engineering, Astronomy and Planetary Sciences, Environmental Sciences

References

1. Gulyaeva, T.L., Haralambous, H. Three-hourly indices of ionospheric activity. Geomagn. Aeronomy, 61(6), 836-845, 2021. DOI: 10.1134/S0016793221060062.
2. Gulyaeva, T.L., Haralambous, H., Stanislawska, I. Persistent perturbations of ionosphere at diminution of solar and geomagnetic activity during 21-24 solar cycles. J. Atmos. Solar-Terr. Phys., 221, 105706, https://doi.org/10.1016/j.jastp.2021.105706, 2021.
3. https://2021eddysymposium.ipostersessions.com/Default.aspx?s=eddy2021gallery

Funding

1. Russian Foundation for Basic Research (No. 19-52-25001_Kipr_a)
2. Research Promotion Foundation, Cyprus (No. BILATERAL/RUSSIA (RFBR)/1118/0004)

Supplemental files

No data provided

Additional information

Competing interests

No competing interests were disclosed.

Data availability statement

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license

Copyright © 2022 Gulyaeva et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.