Advances in Astronomy and Space Physics, Volume 2, Issue 1 (2012)

Magnetized Rossby waves in mid-latitude ionosphere F-layer

D. A. Saliuk, O. Agapitov, G. P. Milinevsky

Taras Shevchenko National University of Kyiv, Glushkova ave., 4, 03127, Kyiv, Ukraine

Abstract
We present the results of study of the ionosphere quasi-periodic perturbations on the basis of the analysis of the critical f0F2 frequency variations. The temporal scales of the perturbations are about 7 days and relative amplitude of the f0F2 perturbations are up to 40% of the averaged electron density value. It is assumed from the temporal scale and position that the critical f0F2 frequency variations are caused by Rossby wave-like disturbances with magnetic field influence on the ions. We studied the spatial and temporal scales of the waves at the F-layer altitudes on the basis of the mid-latitude ionosonde network measurements (Millstone Hill, Dyess, and Point Arguello stations data). The generalized Charney-Obukhov equation is proposed to describe the dynamics of the perturbations. We present the numerical model based on the full reduction algorithm for numerical solution of the dynamics equation.

Keywords:
plasma waves and instabilities, ionospheric disturbances, wave propagation