Localized auroral disturbance in the morning sector of topside ionosphere as a standing electromagnetic wave期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

Localized auroral disturbance in the morning sector of topside ionosphere as a standing electromagnetic wave

Authors:	EM Dubinin PL Israelevich NS Nikolaeva I Kutiev IM Podgorny

Institution:	1. Space Research Institute, Academy of Sciences USSR, Moscow, USSR;2. Central Laboratory for Space Research, Bulgarian Academy of Sciences, Sofia, Bulgaria

Abstract:	An intense, localized auroral disturbance observed by Intercosmos-Bulgaria-1300 satellite in the morning sector at the altitude 850 km is analyzed in detail. The disturbance is characterized by strong “jumps” of electric and magnetic fields reaching ～ 80 mV/m and ～ 100 nT, fluctuations of ion density (Δn/n ～ 70%) and bursts of downward and upward energetic electron fluxes. Electric and magnetic disturbances display a distinct spatial-temporal relationship typical for the standing quasi-monochromatic wave ( $? ～ 1 Hz, λ_{x} ～ 10 km$ ). The ratio of amplitudes of electric and magnetic fluctuations is equal to Alfvén velocity (ΔE/ΔB ～ v_A/c). However, a strong parallel component of the electric field (～ 30 mV/m) and large ion density fluctuations indicate significant changes of plasma properties (the effects of anomalous resistivity are possible).

Keywords:
本文献已被 ScienceDirect 等数据库收录！