Precipitation of energetic electrons into the high-latitude atmosphere in the morning local sectors

On the basis of the combined employment of the experimental data (ground-ba sed measurements of electron concentration profiles by the EISCAT radar and satellite measurements of the energy spectra of trapped electrons) and the developed methods for the reconstruction of the energy spectra of precipit ating electrons, the intrusion of high energy (E > 30 keV) electrons is stu died during the events of auroral absorption, which were observed in the mo rning local sectors. The peculiarities of the variations of the electron co ncentration profiles and of the spectra and fluxes of the precipitating ele ctrons in the course of the development of the disturbance are considered. A quantitative description of the precipitating electron fluxes and auroral absorption in the framework of the theory of the pitch-angle electron diff usion on the whistler mode waves is given, and it is demonstrated that a co nsiderable increase in the electron fluxes in the disturbance maximum is du e to an imtensification of the diffusion process (to an increase in the dif fusion coefficients D* at the boundary of the cone of losses).