Magnetogravity waves in the ionosphere under conditions of finite conductivity

Spectral characteristics of magnetogravity waves generated by high-energy mass source in the equatorial region of the atmosphere, Part I

“…Note that in environment with chosen parameters the Alfvén mode is not avail able. For comparison with well known dispersion curves of acoustic and internal gravity waves on Fig. 2 In paper (Barkhatov et al, 2012) in a similar approach were obtained dispersion curves of propagat ing MGW modes in the case of vertical orientation of the geomagnetic field (along the axis OZ) which corre sponds to the ionospheric auroral regions. The results of the calculations were found two propagating MGW modes: fast mode which propagates along the mag netic field H 0 , and slow mode propagating at an angle θ = 45° to the plane XY.…”

“…Some part of this is due to disturbances caused by of acoustic gravity waves, which changes in the electron concentration of ionospheric layers (Hocke et al, 1996;Kirchengast, 1997;Balthazor and Moffett, 1997;Cai et al, 2011;Song et al, 2012) and well known as traveling iono spheric disturbances (TIDs). It is noted (Sorokin and Fedorovich, 1982;Barkhatova et al, 2009;Barkhatov et al, 2012) that passage of magnetogravity type waves disturb ionospheric layers density as well as geomag netic field components. As sources of ionospheric dis turbances including TIDs auroral electrojets are often considered (Hunsucker, 1982;Afraimovich et al, 2000;Zhivet'ev et al, 2005), natural geophysical events (earthquakes and tsunamis) (Pulinets et al, 1998;Liu J.Y., et al, 2000;Liperovsky et al, 1992;Dabas et al, 2007;Hickey et al, 2009;Perrone et al, 2010;Xu et al, 2010;Liu et al, 2011) as well as high energy events of artificial origin-ground and altitude explosions and artificial heating of the ionosphere (Alperovitch et al, 1985a,b,c) ;Nagorskiy, 1985;Chernogor and Frolov, 2013a,b).…”

“…The temperature of the ionosphere is not high enough to propagation of LS TIDs with velocities exceeding 1300 m/s (Sorokin and Fedorovich, 1982). However the consideration of electromagnetic processes in the geomagnetic field allows to receive the disturbances transfer velocities up to 4000 m/s due to the propagation of so called mag netogravity waves (MGWs) (Barkhatov et al, 2012).…”