NUMERICAL MODELING OF AURORAL ELECTROJET DURING GEOMAGNETIC DISTURBANCES WITH PARTICLE PRECIPITATION INCLUDED

Model studies of particle precipitation effect in auroral electrojet dynamics during magnetospheric substorms have been performed. The calculations were conducted using the Global Self-consistent Model of the Thermosphere, Ionosphere and Protonosphere (GSM TIP) designed at the West Department of IZMIRAN, with the calculations of electric fields in the Earth's ionosphere included. It is shown, that taking into account particle precipitation, one can reproduce in the model such a well-known morphological feature as a much greater strengthening of the westward electrojet during a substorm than of the eastward one. It is also demonstrated that substorms associated with precipitation effects in the F2-layer of the ionosphere are connected with the redistribution of the electric field potential in the Earth's ionosphere. Based on the results obtained, a conclusion is made that for the correct description of the substorm-time behavior of auroral electrojets and F2-layer of the ionosphere both at high and middle and low geomagnetic latitudes, particle precipitation should be taken into account.