Investigation of the Ionosphere over Antarctica Under Quiet Space Weather Conditions: Results of Vertical Sounding of the Ionosphere September 14–24, 2020

Authors

DOI:

https://doi.org/10.47774/phag.01.01.2020-4

Keywords:

electron density, F2 layer peak height, ionosonde, quiet space weather, models of the ionosphere, downward plasma flux

Abstract

We present observational results of variations in the ionospheric parameters hmF2 and NmF2 over the Ukrainian Antarctic station “Akademik Vernadsky” for magnetically quiet conditions. The results of comparative analysis of observational data and the International Reference Ionosphere-2016 model predictions are presented. The main objective of this study is to investigate the temporal variations of two key ionospheric parameters – the F2 layer peak height and electron density – during very quiet space weather conditions using data of vertical sounding of the ionosphere obtained over the Ukrainian Antarctic station “Akademik Vernadsky” and comparison the observation results with model values. Methods: The temporal variations of the F2 layer peak height and electron density were calculated from ionograms obtained with ionosonde installed at the Ukrainian Antarctic station “Akademik Vernadsky” with subsequent electron density profile inversion. Diurnal variations of hmF2 and NmF2 were calculated using a set of sub-models of the IRI-2016 model for comparison with results of observational studies. Results: We found that for the Antarctic region option of IRI-2016 model for the F2 layer peak height SHU-2015 provides a better fit for hmF2 through the investigated period compare to the AMTB-2013 model predictions. Electron density models (URSI, CCIR) generally well reproduce the observed variations of NmF2 during periods of absence non-standard manifestations of space weather, which are possible for quiet conditions too. Hypotheses regarding the possible reasons for experimental and model differences in variations of NmF2 are discussed. The analysis of effect of geomagnetic storm on September 24, 2020 on NmF2 variations was carried out. Conclusions: The obtained results demonstrate peculiarities of the state of the ionosphere-plasmasphere system over Antarctica under very quiet space weather conditions and provide evaluation of predictive capabilities of modern international reference ionosphere models. New knowledge about the features of electron density variations in the ionosphere for magnetically quiet conditions over the Antarctic region has practical value for specialists which are engaged in the study of the near-Earth space environment, in particular, at high latitudes, and also work on correction of global ionospheric models.

References

Borries, C., Berdermann, J., Jakowski, N., & Wilken, V. (2015). Ionospheric storms – A challenge for empirical forecast of the total electron content. Journal of Geophysical Research: Space Physics. 120, 3175–3186. https://doi.org/10.1002/2015JA020988

Obana, Y., Maruyama, N., Shinbori, A., Hashimoto, K. K., Fedrizzi, M., Nosé, M.,Otsuka, Y., Nozomu, N.,Hori, T.,Kumamoto, A. Tsuchiya, F., Matsuda, S., Matsuoka, A., Kasahara, Y., Yoshikawa, A., Miyoshi, Y., & Shinohara, I. (2019). Response of the ionosphere-plasmasphere coupling to the September 2017 storm: What erodes the plasmasphere so severely? Space Weather. 17, 861–876. https://doi.org/10.1029/2019SW002168

Pietrella, M., Nava, B., Pezzopane, M., Orue, Y.M., Ippolito, A. & Scotto C. (2017). NeQuick2 and IRI2012 models applied to mid and high latitudes, and the Antarctic ionosphere. Antarctic Science. 29(3), 265–267. https://doi.org/10.1017/S0954102016000602

Broom, S.M. (1984). A new ionosonde for Argentine Islands ionospheric observatory, Faraday Station. British Antarctic Survey Bulletin. 62, 1–6. http://nora.nerc.ac.uk/id/eprint/523821/1/bulletin62_02.pdf

Koloskov, O.V., Kashcheyev, A.S., Zalizovski, A.V., Kashcheyev, S.B., Budanov, O.V., Charkina, O.V., Pikulik, I.I., Lysachenko, V.M., Sopin, A.O., & Reznychenko, A.I. New digital ionosonde developed for Ukrainian Antarctic station “Akademik Vernadsky”. (2019). Proceedings of IX International Antarctic Conference dedicated to the 60th anniversary of the signing of the Antarctic Treaty in the name of peace and development of international cooperation: Physical sciences, Ukraine, 170–171.

Bogomaz, O.V., Shulha, M.O., Kotov, D.V., Zhivolup, T.G., Koloskov, A.V., Zalizovski, A.V., Kashcheyev, S.B., Reznychenko, A.I., Hairston, M.R., & Truhlik V. (2019). Ionosphere over Ukrainian Antarctic Akademik Vernadsky station under minima of solar and magnetic activities, and daily insolation: case study for June 2019. Ukrainian Antarctic Journal, 1 (64). https://doi.org/10.33275/1727-7485.2(19).2019.154.

Piggott, W.R., & Rawer, K. (1972).URSI handbook of Ionogram interpretation and reduction (2nd ed.). (WDC-A report UAG-23). National Oceanic and Atmospheric Administration.

Huang, X., & Reinisch, B.W. (1996). Vertical electron density profiles from the digisonde network. Advances in Space Research, 18, 121–129. https://doi.org/10.1016/0273-1177(95)00912-4

Bogomaz, O.V., Kotov, D.V., Shulha, M.O., & Gorobets, M.V. (2019). Comparison of the F2 layer peak height variations obtained by ionosonde and incoherent scatter radar. Bulletin of the National Technical University “KhPI”. Series: Radiophysic and ionosphere, 25(1350), 58–61.

Bilitza D., Altadill D., Truhlik V., Shubin V., Galkin I., Reinisch B., & Huang X. (2017). International Reference Ionosphere 2016: From ionospheric climate to real-time weather predictions. Space Weather, 15, 418–429. https://doi.org/10.1002/2016SW001593

International Radio Consultative Committee (CCIR). (1967). Atlas of ionospheric characteristics. (Report No. 340). International Telecommunication Union.

Rush, C., Fox, M., Bilitza, D., Davies, K., McNamara, L., Stewart, F., & Pokempner, M. (1989). Ionospheric mapping – An update of foF2 coefficients. Telecommunications Journal, 56, 179–182.

Shubin, V. N. (2015). Global median model of the F2-layer peak height based on ionospheric radio-occultation and ground-based digisonde observations. Advances in Space Research, 56(5), 916–928. https://doi.org/10.1016/j.asr.2015.05.029

Altadill, D., Magdaleno, S., Torta, J. M., & Blanch, E. (2013). Global empirical models of the density peak height and of the equivalent scale height for quiet conditions. Advances in Space Research, 52(10), 1756–1769. https://doi.org/10.1016/j.asr.2012.11.018

Kotov, D.V., Richards, P.G., Truhlík, V., Maruyama, N., Fedrizzi, M., Shulha, M.O., Bogomaz, O.V., Lichtenberger, J., Hernández-Pajares, M., Chernogor, L.F., Emelyanov, L.Ya., Zhivolup, T.G., Chepurnyy, Ya.M., & Domnin, I.F. (2019). Weak Magnetic Storms Can Modulate Ionosphere-Plasmasphere Interaction Significantly: Mechanisms and Manifestations at Mid-Latitudes. Journal of Geophysical Research: Space Physics, 124, 9665–9675. https://doi.org/10.1029/2019JA027076

Published

2020-12-29

How to Cite

Шульга, М., Богомаз, О., Котов, Д., Живолуп, Т., Колосков, О., Залізовський, А., & Лисаченко, В. (2020). Investigation of the Ionosphere over Antarctica Under Quiet Space Weather Conditions: Results of Vertical Sounding of the Ionosphere September 14–24, 2020. PHYSICS OF ATMOSPHERE AND GEOSPACE, 1(1), 45-55. https://doi.org/10.47774/phag.01.01.2020-4