|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Variation of plasma pressure in the magnetosphere and geomagnetic stormsтезисы доклада
- Авторы: Stepanova M., Antonova E.E.
- Сборник: Abstracts of the conference The Magnetosphere: New Tools, New Thinking, New Results
- Тезисы
- Год издания: 2017
- Место издания: 2017 Conference, Puerto Varas, Chile, from 12-17 of November 2017
- Первая страница: 48
- Последняя страница: 48
- Аннотация: It is well known that magnetostatic equilibrium is crucial for stability of any plasma configuration. There is a lot of experimental evidence showing that balance of the total pressure in the magnetosphere is fulfilled. This enables us to use the MHD approach to describe global magnetospheric dynamics, including geomagnetic storms and substorms. At the same time, conservation of the plasma pressure along magnetic and current lines in magnetostatic equilibrium, allows the use of the pressure as a “natural tracer” to map one region into another. Using this technique, we conclude that most of the auroral oval is mapped to the cut-ring current (CRC) region, thereby explaining the ring-like shape of the auroral oval. Behavior of the plasma pressure in the magnetosphere during 13-17 November 2012 geomagnetic storm was studied by comparing the plasma pressure obtained from the precipitating ion fluxes, measured by the DMSP data and the pressure obtained from the Van Allen Probes. It was found that the maximum of the plasma pressure and the most equatorial part of the westward auroral electrojet are located at the same L-shell as the seed population of electrons. Later, this leads to the formation of a new radiation belt at this location. (http://cefei.ciencias.uchile.cl/2017puertovaras)
- Добавил в систему: Антонова Елизавета Евгеньевна