Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa33a1618k&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA33A-1618
Physics
2411 Electric Fields (2712), 2427 Ionosphere/Atmosphere Interactions (0335), 2431 Ionosphere/Magnetosphere Interactions (2736), 2437 Ionospheric Dynamics, 7959 Models
Scientific paper
The investigations of the substorm are carried out already many years. In spite of that, the single-valued answers on many questions which arise at the researchers of the substorm till now are not given. To such questions it is possible to concern the questions about the mechanism of occurrence of the substorm and on the influence of the substorm on the Earth's ionosphere. At modeling of the ionospheric effects of substorms it is important to know the following. How does the potential drop through polar caps change at initial stages of the substorm development - stepwise or smoothly? What is the duration of these changes? What and how does occur with the potential drop in the further during development of the substorm down to its termination? How does the time course of intensity of the field aligned currents of the first zone change before the substorm beginning, during substorm and after its termination? Is there a time delay of changes of the field aligned currents of the second zone relative to changes of the field aligned currents of the first zone or potential drop through polar caps? If the delay exists, what is it? How does the high-energy particle precipitation in the auroral zones and polar caps change during the substorm? Is it necessary to set at the modeling of the substorm effects the Substorm Current Wedge? If it is necessary, how make it correctly? On these questions we do not have the single-valued answers. But we shall like very strongly for them to have. We have carried out the modeling researches of the substorm influence on the ionosphere in various statements of the problem. The investigations were spent on the Global Self-consistent Model of the Thermosphere, Ionosphere and Protonosphere, added by the new block of calculation of electric fields in the Earth's ionosphere. In our investigations we have given the particular attention: to electrodynamics of the ionosphere; to changes of the global distributions of foF2, TEC and ion composition of the external ionosphere; to the penetration of magnetospheric convection electric field to the middle and low latitudes; to the effects in the equatorial ionosphere. This work was done under support of the Russian Foundation of Basic Research (Grant N08-05-00274).
Klimenko V. M.
Klimenko V. V.
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