Институт физики Земли им. О.Ю. Шмидта РАН
Геофизический Центр РАН
Москва, Россия
Геофизический центр РАН
Москва, Россия
Москва, Россия
Хельсинки, Финляндия
Хельсинки, Финляндия
Разработана численная модель, которая дает стационарное распределение компонент поля МГД-волны в неоднородном плазменном ящике, моделирующем реальную магнитосферу. Рассматривается проблема достаточного граничного условия на границе ионосфера–магнитосфера для связанной МГД-моды. Для обоснования модельных предположений в явном виде получено неравенство, показывающее, в каком случае можно пренебречь индуктивным xолловским эффектом при рассмотрении отраженной от ионосферных границ альфвеновской волны. Модель предсказывает наличие характерной особенности пространственного амплитудно-фазового распределения поля УНЧ-колебаний, которая не была замечена в работах по теории резонанса силовых линий, – существование области с противоположными фазовыми задержками на стороне источника резонанса. Этот теоретический прогноз подтверждается амплитудно-фазовой широтной структурой Рс5-пульсаций, наблюдаемых STARE радаром и IMAGE магнитометрами. Постепенное увеличение азимутального волнового числа m на меньших L-оболочках наблюдалось на долготно-разделенных радарных лучах.
МГД-волны, геомагнитные пульсации, трансформация мод, ионосферный радар, магнитометр
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