VIAM

Generation, intensification and mutual transformation of the electromagnetic weather forming ULF wave structures in the shear flow driven ionosphere (N 31/14)

Funded by

Shota Rustaveli National Science Foundation of Georgia

Start Date: 2013-07-04 End Date: 2016-07-04

In the work the features of generation of the large scale flows in the ionosphere on the background of inhomogeneous non-stationary winds is considered. From the equation of magnetized (modified by the geomagnetic field) Rossby type waves using multi-scale expansion the nonlinear equation of interaction of amplitudes of five different scale modes is obtained. These modes are: ultra low frequency (ULF) primary magnetized Rossby wave, its two satellites, long wavelength zonal mode and large scale background mode (inhomogeneous wind). The effects of nonlinearities (scalar, vector) in formation of the large scale zonal flows by magnetized Rossby waves with finite amplitudes in the dissipative ionosphere is studied. In this case modified parametric approach is used. On the basis of theoretical and numerical analysis of the corresponding system (generalized problem on the eigen values) the new features of energy pumping from comparably small scale ULF magnetized Rossby wave and the background flow into the large scale zonal flows and nonlinear self-organization of collective activity of above mentioned five modes in the ionosphere medium is revealed. Generation of the zonal flow is caused by the Reinolds stress of the magnetized Rossby wave with finite amplitude and effect of the background shear flow. It is shown, that amplitude of the background flow affects the increment of modulation instability and the zonal flow generation. The satellite observation data is also analyzed by means of linear and nonlinear methods.

Project members:

Oleg Kharshiladze (Principal Investigator)
Giorgi Aburjania (Coordinator)
Khatuna Elbakidze (Key Personnel)

Talks

Planetary electromagnetic waves in the ionospheric E-layer , by Tamaz Kaladze (Speaker) at First Cairo Conference on Plasma Physics & Applications CCPPA2003, 2003, Cairo, Egypt.
Zonal flow generation by magnetized Rossby waves in the ionospheric E-layer , by Tamaz Kaladze (Speaker), Dejin Wu, Oleg Pokhotelov, Sagdeev Roald, Lennart Stenflo, Pradip Shukla at Mathematical Physics Proceeding of the 12th Regional Conference, 2006, Islamabad,Pakistan.
Dynamics of the electromagnetic ion cyclotron nonlinear solitary structures in the inner magnetosphere, by Tamaz Kaladze (Speaker), Nodar Tsintsadze, Wendell Horton, James W. Van Dam at International Congress on Plasma Physics, ICPP , 2010, Santiago,Chile.
Nonlinear solitary structures driven by seismo-electromagnetic emissions in the Earth’s ionosphere, by Tamaz Kaladze (Speaker), Luba Tsamalashvili at International Workshop on Shocks, Turbulence and Nonlinear Systems joint with the International Advanced Workshop on Seismo-Electromagnetic Studies , 2011, Eilat,Israel.
Nonlinear interaction of the Rossby-Khantadze electromagnetic waves with the shear zonal winds in the ionospheric E-layer, by Tamaz Kaladze (Speaker), Laila Kahlon, Luba Tsamalashvili at International Scientific Spring, 2013, Islamabad,Pakistan.
Large-scale Vortices and Zonal Winds in Planetary Atmospheres/ionospheres: Theory versus Observations, by Oleg Pokhotelov (Speaker), Tamaz Kaladze, Wendell Horton, Laila Kahlon, Onishchenko Oleg at Annual Call by ISSI, 2013, Bern, Switzerland.
Self-organization of ULF electromagnetic wave structures in the shear flow driven dissipative ionosphere, by Khatuna Elbakidze (Speaker), Oleg Kharshiladze at U.R.S.I. Landesausschuss in der Bundesrepublik Deutschland e.V. Kleinheubacher Tagung 2014, 2014, Miltenberg, Germany.
Excitation of zonal flow and magnetic field by ULF planetary waves in the earth’s ionospheric E-layer, by Tamaz Kaladze (Speaker), Laila Kahlon, Luba Tsamalashvili at 17th International Congress on Plasma Physics (ICPP), 2014, Lisbon,Portugal.
Nonlinear generation of zonal flows and large scale magnetic fields by ULF waves and modeling of mutual transformation of these waves in the ionosphere, analysis of satellite data, by Khatuna Elbakidze (Speaker), Oleg Kharshiladze at 26th General Assembly of the International Union of Geodesy and Geophysics (IUGG), 2015, Prague, Czech Republic.
Generation of Zonal Flow and Magnetic Field by Planetary Waves In The Earth’s Ionosphere., by Tamaz Kaladze (Speaker), Luba Tsamalashvili, Khatuna Elbakidze, Oleg Kharshiladze at The 2d Conference on Astrophysics and Space Science (APSS 2016), 2016, Beijing, China.
Special exp-function method for travelling wave solutions of Burger's equation, by Luba Tsamalashvili (Speaker) at Reports of Enlarged Sessions of the Seminar of I. Vekua Institute of Applied Mathematics, 2016, Tbilisi,Georgia.
The effect of the changes in the southward Bz component of interplanetary magnetic field on the ionospheric conductivities, by Tamaz Kaladze (Speaker), Ali Yesil at International Conference On Computational Method In Applied Sciences (ICCMAS 2019), 2019, Istanbul, Turkey .
Effect of magnetic declination on refractive index and wave polarization coefficients of electromagnetic waves in mid-latitude ionosphere, by Osman Ozcan (Speaker), Tamaz Kaladze, David Kaladze, Selçuk Sağır at The Fourth International Conference on Applications of Mathematics and Informatics in Natural Sciences and Engineering, 2019, Tbilisi, Georgia.

Publications

Khatuna Elbakidze, Oleg Kharshiladze, Weather Forming Ultra Low Frequency Electromagnetic Waves at Interaction with Local Inhomogeneous Winds in the Ionosphere., Sun and Geosphere, 2013; 8(1): 51-54 I, SRTI-BAS, 2013.
Giorgi Aburjania, Khatuna Elbakidze, Oleg Kharshiladze, Gaetsno Zimbardo, Evolution of Weather forming ULF electromagnetic structures in the ionospheric shear flows, JOURNAL OF THE GEORGIAN GEOPHYSICAL SOCIETY, 16, 89–110., Tbilisi University Press, 2014.
Oleg Kharshiladze, Khatuna Elbakidze, ZONAL FLOW AND MAGNETIC FIELD GENERATION IN THE IONOSPHERE ON THE BASIS OF MULTISCALE EXPANSION, JOURNAL OF THE GEORGIAN GEOPHYSICAL SOCIETY, 17(C), Tbilisi University Press, 2015.
Oleg Kharshiladze, Khatuna Elbakidze, Zonal Flow and Stremaer Generation by Small – Scale Drift-Alfven Waves in Ionosphere Plasma, JOURNAL OF THE GEORGIAN GEOPHYSICAL SOCIETY, 17(C)., Tbilisi University Press, 2015.
Oleg Kharshiladze, Khatuna Elbakidze, Investigation of the Strong Turbulence in the Geospace Environment, Adv. Radio Sci., 13, 243–250, 2015, U.R.S.I, 2015.