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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Substorm intensification from themis satellite observations and IMF Bz component changesстатья
- Авторы: Kozelova T.V., Kozelov B.V.
- Журнал: Physics of Auroral Phenomena
- Том: 37
- Номер: 1
- Год издания: 2014
- Издательство: Федеральное государственное бюджетное научное учреждение "Полярный геофизический институт"
- Местоположение издательства: Апатиты
- Первая страница: 22
- Последняя страница: 25
- Аннотация: The substorm-associated changes of the particles and fields at the Earthward part of the plasma sheet are examined using data from four THEMIS satellites during the substorm intensification on January 6, 2008, when the satellites were located in the different MLT sectors of the magnetosphere. The enhanced convection field during the Bz southward turning of the interplanetary magnetic field leads to the earthward approach of the inner edge of the plasma sheet. The Alfven convective sheets of the 0.8-10 keV electrons are observed in the evening sector. The satellite in the morning sector saw the nose-like structure of the ions 8-10 keV. The outer boundaries of energetic particles became steeper during the substorm growth phase. Before the substorm onset, the isotropic boundary of 29 keV ions was located at radial distance 6.3 Re in the evening sector and in the morning sector at distance 8 Re. After northward turning of IMF, the quick magnetic field line stretching and Energy-Dispersed Ion Structures (EDIS) were observed at the morning sector. Then, ten minutes after the EDIS onset, the pseudo-breakup and injection of higher-energy ions (81-157 keV) occur at the evening sector. We discuss a possible association of the substorm magnetotail dynamics with IMF Bz changes.
- Добавил в систему: Козелов Борис Владимирович