Numerical studies on the dynamics of the ionospheric current system
| Autor: | Thomas Neukirch, G. T. Birk, Jürgen Dreher, U. Becker |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Convection
Physics Atmospheric Science Ionospheric dynamo region Momentum transfer Aerospace Engineering Astronomy and Astrophysics Plasma Mechanics Atmospheric sciences Geophysics Physics::Plasma Physics Space and Planetary Science Electric field Physics::Space Physics General Earth and Planetary Sciences Electric current Current (fluid) Ionosphere |
| Zdroj: | Advances in Space Research. 22:1369-1372 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/s0273-1177(98)80037-9 |
| Popis: | We study the dynamics of the ionospheric current system by means of computational simulations. The initial configuration for the simulations represents numerical solutions of a stationary two-dimensional fluid model that focuses on the closure of one pair of field-aligned electric currents in the lower ionosphere. In this model the momentum transfer between the plasma and the neutral gas is included as well as the Hall term. The dynamical evolution of the current system caused by enhanced magnetospheric sheared plasma flows is investigated by means of numerical simulations carried out with a plasma-neutral gas fluid code. It is shown that in a self-consistent fluid model the intensification of electric field dominated auroral electrojets in the moring and evening sectors of the auroral oval can be understood as the ionospheric response to enhanced magnetospheric plasma convection. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect