Magnetospheric turbulence and properties of magnetospheric dynamics

High level of turbulence is one of the main peculiarities inherent to magnetospheric dynamics. Mechanisms for generation of magnetospheric turbulence are analyzed. The instabilities in the plasma pressure distribution are examined as source of large and medium scale modes in the turbulence spectra. Large-scale modes (which scales are comparable with scale of the magnetosphere) lead to convective transport of the magnetospheric particles. Excitation of such modes is analyzed being based on the suggestion of the existence of week instability in the distribution of plasma pressure.