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

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作者

Tamara Gulyaeva¹ , Haris Haralambous²

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

会议/活动

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

海报摘要

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.

关键词

Space weather, Ionosphere disturbances, Geomagnetic activity

研究领域

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

参考文献

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

基金

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

补充材料

暂无数据

附加信息

利益冲突

No competing interests were disclosed.

数据可用性声明

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

知识共享许可协议

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.