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The Relationship of the IG and T Ionospheric Indices to the Solar and Geomagnetic Activity Indices

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Abstract

An analysis of the relationship between the monthly mean ionospheric indices IG and T and the indices of solar (F107) and geomagnetic (Ap) activity based on the massif of these data within 1954–2020 interval is presented. F107 and Ap are the monthly mean flux of the solar radio emission at a wavelength of 10.7 cm and the planetary index of geomagnetic activity Ap, respectively. It is found that the index F = (F1070 + F107–1)/2 provides a higher correlation to the ionospheric indices than the indices F107 over the given (F1070) or previous (F107–1) months. The IG and T dependencies on F in the form of a second-degree polynomials make it possible to reproduce 96% of variations in IG and 98% of variations in T for the analyzed time interval. That is the reason that the additional contribution of Ap into IG and T is weak. Nevertheless, the contribution of Ap into T and IG depends on the time of the year: it is not significant for January and is significant for July. This property of the annual anomaly in the ionospheric parameters by the IG index, apparently, is discovered for the first time. In all considered cases, an increase in Ap leads to a decrease in T and IG, that is, to a mean (global) decrease in the median of the F2-layer maximum concentration and, under equal other conditions, such a decrease is more significant in July than in January. The properties of the dependencies of the IG and T indices on F and Ap are in many aspects similar, but the accuracy of these dependencies is higher for T than for IG.

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REFERENCES

  1. Bilitza, D., IRI the international standard for the ionosphere, Adv. Radio Sci., 2018, vol. 16, pp. 1–11.

    Article  Google Scholar 

  2. Brown, S., Bilitza, D., and Yiğit, E., Improvements to predictions of the ionospheric annual anomaly by the international reference ionosphere model, Ann. Geophys. Discuss., 2018. https://doi.org/10.5194/angeo-2018-97

  3. Bryunelli, B.E. and Namgaladze, A.A., Fizika ionosfery (Ionospheric Physics), Moscow: Nauka, 1988.

  4. Buonsanto, M., Ionospheric storms: A review, Space Sci. Rev., 1999, vol. 88, pp. 563–601.

    Article  Google Scholar 

  5. Caruana, J., The IPS monthly T index, in Solar–Terrestrial Prediction: Proc. Workshop at Leura, Australia (October, 1989), 1990, vol. 2, pp. 257–263.

  6. Deminov, M.G., Solar activity index for long-term ionospheric forecasts, Cosmic Res., 2016, vol. 54, no. 1, pp. 1–7.

    Article  Google Scholar 

  7. Deminov, M.G. and Deminova, G.F., Solar activity index for the long-term prediction of the F2 layer critical frequency, Geomagn. Aeron. (Engl. Transl.), 2019, vol. 59, no. 2, pp. 177–184.

  8. Deminov, M.G. and Deminova, G.F., Dependence of the local index of annual asymmetry for NmF2 on solar activity, Geomagn. Aeron. (Engl. Transl.), 2021, vol. 61, no. 2, pp. 227–233.

  9. Deminov, M.G., Deminova, G.F., Depueva, A.Kh., and Depuev, V.Kh., Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity, J. Sol.-Terr. Phys., 2017, vol. 3, no. 4, pp. 67–73.

    Google Scholar 

  10. Deminov, M.G., Mikhailov, A.V., Mikhailov, V.V., Shubin, V.N., and Tsybulya, K.G., Ionospheric modeling and prediction, in Sistemnyi monitoring ionosfery. Sbornik nauchnykh trudov (System Monitoring of the Ionosphere: Collection of Scientific Works), Kotonaeva, N.G., Ed., Moscow: Fizmatlit, 2019, pp. 286–343.

  11. Deminov, M.G., Deminova, G.F., Depuev, V.Kh., and Depueva, A.Kh., Relation of the monthly mean ionospheric T index to solar and geomagnetic activity indices, Geomagn. Aeron. (Engl. Transl.), 2021, vol. 61, no. 6, pp. 830–835.

  12. Hocke, K. and Schlegel, K., A review of atmospheric gravity waves and traveling ionospheric disturbances: 1982–1985, Ann. Geophys., 1996, vol. 14, no. 9, pp. 917–940.

    Google Scholar 

  13. Hunsucker, K., Atmospheric gravity waves generated in the high-latitude ionosphere: A review, Rev. Geophys. Space Phys., 1982, vol. 20, pp. 293–315.

    Article  Google Scholar 

  14. Jones, W.B. and Gallet, R.M., The representation of diurnal and geographic variations of ionospheric data by numerical methods, ITU Telecommun. J., 1962, vol. 29, pp. 129–147.

    Google Scholar 

  15. Jones, W.B. and Gallet, R.M., The representation of diurnal and geographic variations of ionospheric data by numerical methods, 2. Control of instability, ITU Telecommun. J., 1965, vol. 32, pp. 18–28.

    Google Scholar 

  16. Liu, R., Smith, P., and King, J., A new solar index which leads to improved foF2 predictions using the CCIR atlas, Telecommun. J., 1983, vol. 50, no. 8, pp. 408–414.

    Google Scholar 

  17. Nava, B., Coisson, P., and Radicella, S.M., A new version of the NeQuick ionosphere electron density model, J. Atmos. Sol.-Terr. Phys., 2008, vol. 70, pp. 1856–1862.

    Article  Google Scholar 

  18. Newell, P.T., Greenwald, R.A., and Ruohoniemi, J.M., The role of the ionosphere in aurora and space weather, Rev. Geophys., 2001, vol. 39, no. 2, pp. 137–149.

    Article  Google Scholar 

  19. Newell, P.T., Sotirelis, T., and Wing, S., Seasonal variations in diffuse, monoenergetic, and broadband aurora, J. Geophys. Res., 2010, vol. 115, p. A03216. https://doi.org/10.1029/2009JA014805

    Article  Google Scholar 

  20. Ramachandran, K.M. and Tsokos, C.P., Mathematical Statistics with Applications, Oxford: Elsevier, 2009.

    Google Scholar 

  21. Rishbeth, H. and Müller-Wodarg, I.C.F., Why is there more ionosphere in January than in July? The annual asymmetry in the F2-layer, Ann. Geophys., 2006, vol. 24, no. 12, pp. 3293–3311.

    Article  Google Scholar 

  22. Tanskanen, E.I., Pulkkinen, T.I., Viljanen, A., et al., From space weather toward space climate time scales: substorm analysis from 1993 to 2008, J. Geophys. Res., 2011, vol. 116, p. A00I34. https://doi.org/10.1029/2010JA015788

    Article  Google Scholar 

  23. Zakharenkova, I.E., Krankowski, A., Bilitza, D., et al., Comparative study of foF2 measurements with IRI-2007 model predictions during extended solar minimum, Adv. Space Res., 2013, vol. 51, pp. 620–629.

    Article  Google Scholar 

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ACKNOWLEDGMENTS

The data on solar activity indices have been taken from the sites (http://www.ukssdc.ac.uk/wdcc1) (WDC for Solar-Terrestrial Physics, UK), (http://www.spaceweather.gc.ca/solarflux) (Space Weather, Canada), and (http://www.sws.bom. gov.au/HF_Systems) (Space Weather Services, Australia). The data on geomagnetic activity indices have been taken from the site isgi.unistra.fr (International Service of Geomagnetic Indices, ISGI).

Funding

The study has been supported by the Russian Foundation for Basis Research (project no. 20-05-00050 (in the part of allowance for geomagnetic activity)) and by the Russian Scientific Foundation (RNF) (project no. 20-72-10 023 (in the part of allowance for solar activity).

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Authors and Affiliations

  1. Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Moscow, Russia

    M. G. Deminov, G. F. Deminova, V. Kh. Depuev & A. Kh. Depueva

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  1. M. G. Deminov
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  2. G. F. Deminova
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  3. V. Kh. Depuev
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  4. A. Kh. Depueva
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Correspondence to M. G. Deminov.

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Translated by A. Danilov

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Deminov, M.G., Deminova, G.F., Depuev, V.K. et al. The Relationship of the IG and T Ionospheric Indices to the Solar and Geomagnetic Activity Indices. Geomagn. Aeron. 62, 382–387 (2022). https://doi.org/10.1134/S0016793222040065

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