A STUDY OF DYNAMICAL BEHAVIOR OF SPACE ENVIRONMENT

摘要

During the storm time, the ionospheric heading is a very important problem, which may trigger hydromagnetic waves. However, study of the propagation of hydromagnetic waves in the region of the ionosphere is a very complex problem due to the variations of the collision frequencies of ions, electrons, and neutrals. Therefore, we shall restrict ourselves to dealing only with the propagation of hydromagnetic waves in the upper F2 region of the ionosphere. In this region, we find that electrons are in a transitional regime from collisional to collisionless conditions and ions are in a collisionless regime. Thus, we have derived a set of governing equations which are based on the fact that the isotropic electrons are fluid like, and the anisotropic ions follow kinetic equations modified by ion-electron collisions. It has been shown that the magneto-acoustic waves of a period of ~ 10 seconds ore dissipated by ion Landau damping and electron thermal conduction and viscosity. The numerical solutions under ionospheric conditions show that electron heating has always prevailed over ion heating in agreement with observations in the present study.