Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....3632a&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #3632
Physics
Scientific paper
On the basis of three-fluid nature of ionospheric plasma, the physical mechanism of generation of internal electric field in E and F-regions of the ionosphere by large-scale (with wavelength (10^3div10^4) km) wavy perturbations is revealed. It is shown, that electric field of polarization is generated by slow planetary hydrodynamic waves with periods from a day to fortnight and more. Herewith, generation of electrostatic field has the character of dynamo-mechanism. It is established, that ultra-slow planetary Rossby type waves do not generate the internal electric field even in the ionosphere. It is shown for the first time, that the fast (with velocity more than 1 km s-1) synoptically short-period (from a few second to a few hours) planetary waves in E and F-regions of the ionosphere disturb only electron component of ionospheric plasma, which are "frozen" in the geomagnetic field. Herewith, the internal vortex electric field is naturally generated. It is established, that the value of large-scale vortex electric field exceeds few times the value of polarization field, generated by dynamo-effect. The general formula, giving the possibility to determine uniquely the potential or vortex character of generated internal electric field, depending on phase velocity of large-scale ionospheric wavy perturbations, latitude inhomogeneity of the geomagnetic field, angular velocity of Earth rotation and meridian winds' velocity in the Earth ionospohere is obtained.
Aburjania George D.
Chargazia Kh. Z.
Jandieri G. V.
Khantadze A. G.
Kharshildaze O. A.
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