摘要
综合分析EISCAT雷达与卫星当地测量数据 ,并利用磁层磁场模式对磁力线进行追踪 ,研究了发生在极光椭圆朝极盖边界附近电离层中 ,一例反常的背离太阳流动的强等离子体对流事件 ,及相关的太阳风 -磁层 -电离层耦合过程 .结果表明 ,磁暴期间IMFBz 指向南时观测到这一反常高速对流 ,及其相应的等离子体性态特征 。
An abnormal anti sunward intense flow of plasma convection is observed by EISCAT radar in the high latitude ionosphere near the polar cap boundary. It occurred at morning sector of MLT under conditions of southward IMF B z during the recovery phase of a moderate magnetic storm. A synthetic analysis of radar data and in situ satellite observations is made in combination with a tracing of magnetic field lines by means of magnetospheric field model on this event. It is evidently indicated that the abnormal reversed westward flow of plasma convection and the features of the plasma structure and property are probably the ionospheric signatures of magnetic reconnection taking place at the dayside magnetopause. [
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
2001年第4期446-453,T001,共9页
Chinese Journal of Geophysics
基金
国家自然科学基金 ( 40 0 74 0 39
4 9984 0 0 1 )
教育部高等学校博士学科点专项科研基金资助项目
关键词
极区
电离层
等离子体对流
粒子沉降
磁场重联
太阳风-磁层-电离层耦合
Polar ionosphere, Plasma convection, Particle precipitation, Magnetic reconnection, Solar wind magnetosphere ionosphere coupling.
