Modelling of spatial temporal variations of dynamic and thermal process parameters in geospace over Ukraine during the minimum of 24th cycle of solar activity (2009, 2019)

1Kolodyazhnyi, VV, 2Lyashenko, MV, 2Emelyanov, LYa., 3Dzyubanov, DA
1Institute of Ionosphere of the NAS of Ukraine and MES of Ukraine, Kharkiv, Ukraine; National Technical University «Kharkiv Polytechnic Institute», Kharkiv, Ukraine
2Institute of Ionosphere of the NAS of Ukraine and MES of Ukraine, Kharkiv, Ukraine
3National Technical University «Kharkiv Polytechnic Institute», Kharkiv, Ukraine
Space Sci. & Technol. 2023, 29 ;(1):15-35
https://doi.org/10.15407/knit2023.01.015
Язык публикации: Ukrainian
Аннотация: 
Modelling of spatiotemporal variations of parameters of dynamic and thermal processes in ionospheric plasma on the phases of the minimum of the 24-th cycle of solar activity according to the Kharkiv radar of incoherent scattering is performed. For typical geophysical periods (vernal and autumn equinoxes, summer and winter solstices) the diurnal dependences of parameters of the processes in the ionospheric plasma at altitudes from 210 to 450 km are constructed. The analysis of spatial and temporal variations of parameters of dynamic and thermal processes in the ionosphere is given.
       The value of the plasma transfer velocity due to ambipolar diffusion, the density of the full plasma flux and the flux of charged particles due to ambipolar diffusion, the value of the energy supplied to the electron gas, the density of the heat flux transferred by electrons from the plasmasphere to the ionosphere, as well as the velocity of the equivalent neutral wind, and the meridional component of the neutral wind velocity were calculated.
       It was found that for most of the studied periods, weak variations in space weather do not lead to significant changes in spatiotemporal variations of the parameters of dynamic and thermal processes in the ionosphere. Quantitative and qualitative characteristics of most of these parameters and their diurnal variations were typical for the considered seasons. On the contrary, the velocity of the equivalent neutral wind changed significantly (up to 2—2.5 times) even with a weak increase in geomagnetic activity. The reasons for such changes may be the strengthening of horizontal thermospheric winds and the penetration of zonal magnetospheric electric fields into midlatitudes during the equinoxes.
        The obtained results of calculations can be used in basic studies of solar-terrestrial relations and geospace, to solve applied problems related to the ability to predict the state of space weather, as well as to further develop the regional ionosphere model CERIM IION.
Object of research: physical processes in ionospheric plasma.
Subject of research: spatiotemporal dependences of the main parameters of ionospheric plasma, which were obtained using incoherent scattering radar.
        Research methods — terrestrial radiophysical method of incoherent scatter of radio waves, statistical analysis of observation results, semi-empirical modelling of parameters of dynamic and thermal processes.
Ключевые слова: ionosphere, ionospheric modelling, parameters of dynamic and thermal processes, physical processes in ionospheric plasma, radiophysical methods of geospace research, solar activity
References: 
1. Brjunelli B. E., Namgaladze A. A. Ionospheric physics, 528 p. (Nauka, Moscow, 1988) [in Russian].
2. Grigorenko Y. I., Lysenko V. N., Taran V. I. Chernogor L. F. (2003). Radio studies of processes in the ionosphere associated with the strongest September 25, 1998 geomagnetic storm. Uspekhi sovremennoi radioelektroniki, 9, 57-94 [in Russian].
3. Dzyubanov D. A., Lyashenko M. V., Chernogor L. F. Investigation and modeling of ionospheric plasma parameter variations during minimum period of the 23-th solar activity cycle. Space Science and Technology. 2008. V. 14, No. 1. P. 44-56.
4. Ivanov-Kholodny G. S., Mikhailov A. V. Prediction of the State of the Ionosphere. Deterministic Approach, 190 p. (Gidrometeoizdat, Leningrad, 1980) [in Russian].
5. Iskra D. A., Kolodyazhnyi V. V, Lyashenko M. V. Development of the CERIM IION regional ionosphere model as part of the creation of the space weather forecast service. Theoretical and applied aspects of radio engineering, instrument making and computer technologies. Proceedings of the IV International Scientific and Technical Conference, June 20-21, 2019: a collection of abstracts. Ternopil: Individual Entrepreneur Palyanytsya V A, 2019.P. 15-18.
6. Lyashenko M. V., Pulyaev V. A., Chernogor L. F. Diurnal and seasonal variations of ionospheric plasma parameters during rise solar activity period. Space science and technology. 2006. V. 12, No. 5/6. P. 58-68.
7. Lyashenko M. V., Sklyarov I. B., Chernogor L. F., Chernyak Yu. V. Diurnal and seasonal variations of ionospheric plasma parameters on solar activity abatement. Space Science and Technology. 2006. V. 12, No. 2/3. P. 45-58.
8. Lyashenko M. V., Chernogor L. F., Chernyak Yu. V. Diurnal and seasonal variations of ionospheric plasma parameters at maximum solar activity period. Space Science and Technology. 2006. V. 12, No. 4. P. 56-70.
9. Chernogor L. F., Domnin I. F. (2014). Physics of Geospace Storms. Kharkiv: V. N. Karazin Kharkiv National University Publ. 407 p. [in Russian].
10. Banks P. M. Charged particle temperatures and electron thermal conductivity in the upper atmosphere. Ann. Geophys., 22, 577-584 (1966).
11. Banks P. M. The thermal structure of the ionosphere. Proceedings of the IEEE, 57 (3), 6-30 (1969).
12. Buonsanto M. J., and Holt J. M. Measurements of gradients in ionospheric parameters with a new nine-position experiment at Millstone Hill. J. Atmospheric and Terrestrial Physics, 57, 705-717 (1995).
13. Chernogor L., Domnin I., Lyashenko M. Development of Central Europe Regional Ionospheric Model (CERIM IION) for Space Weather Forecasting // EGU General Assembly 2010 (Vienna, Austria, 02-07 May 2010). Geophysical Research Abstract. Vol. 12,EGU2010-316-2, 2010.
14. Dalgarno A., Degges T. C. Electron cooling in the upper atmosphere. Planet. Space Sci., 16, 125-132 (1968).
15. Ding, Z., Wu, J., Xu, Z. et al. The Qujing incoherent scatter radar: system description and preliminary measurements. Earth Planets Space 70, 87 (2018).
16. Domnin I. F., Chepurnyy Ya. M., Emelyanov L. Ya., Chernyaev S. V., Kononenko A. F., Kotov D. V., Bogomaz O. V., Iskra D. A. Kharkiv incoherent scatter facility // Bulletin of NTU "KhPI". Series: Radiophysics and ionosphere. Kharkiv: NTU "KhPI", 2014. No. 47 (1089). P. 28-42.
17. Emel'yanov L. Ya., Lyashenko M. V., Chernogor L. F., Domnin I. F. Motion of ionospheric plasma: results of observation above Kharkiv in solar cycle 24 // Geomagnetism and Aeronomy. 2018. V. 58, No. 4. P. 533-547.
18. Evans J. V. Theory and practice of ionosphere study by Thomson scatter radar. Proceedings of the IEEE. 1969. Vol. 57, No. 4. P. 496-530.
19. Gordon W. E. Incoherent scatter of radio waves by free electrons with applications to space exploration by Radar. Proceedings IRE. 1958. Vol. 46. P. 1824-1829.
20. Huang, C.-S., J. C. Foster, L. P. Goncharenko, P. J. Erickson, W. Rideout, and A. J. Coster (2005). A strong positive phase of ionospheric storms observed by the Millstone Hill incoherent scatter radar and global GPS network. J. Geophys. Res., 110, A06303,
21. Liu, L., H. Le, W. Wan, M. P. Sulzer, J. Lei, and M.-L. Zhang (2007). An analysis of the scale heights in the lower topside ionosphere based on the Arecibo incoherent scatter radar measurements. J. Geophys. Res., 112, A06307,
22. Picone J. M., Hedin A. E., Drob D. P., Aikin A. C. NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues // J. Geophys. Res. 2002. Vol. 107, № A12. P. 1-16.
23. Richards P. G. Seasonal and solar cycle variations of the ionospheric peak electron density: Comparison of measurement and models. J. Geophys. Res., 106 (A7), 12803-12819 (2001).
24. Rishbeth H., Sedgemore-Schulthess K. J. F., Ulich T. Annual and semiannual variations in the ionospheric F2-layer: II. Physical discussion. Ann. Geophysicae, 18, 945-956 (2000).
25. Salah J. E., Evans J., Wand R. N. Seasonal variations in the thermosphere above Millstone Hill. Radio Sci., 9 (2), 231-238 (1974).
26. Schunk R. W., Nagy A. F. Ionospheres: Physics, Plasma Physics, and Chemistry. Cambridge atmospheric and space science series, 2000. 555 p.
27. Sethi N. K., Dabas R. S., Vohra V. K. Diurnal and seasonal variations of hmF2 deduced from digital ionosonde over New Delhi and its comparison with IRI 2001. Ann. Geophysicae, 22, 453-458 (2004).
28. Zang S., Holt J. M., Zalucha A. M. Midlatitude ionospheric plasma temperature climatology and empirical model based on Saint Santin incoherent scatter radar data from 1966 to 1987. J. Geophys. Res., 109 (A11) 1-9 (2004).