Interplanetary and magnetospheric electric fields during geomagnetic storms: what is more important, steady-state fields or fluctuating fields?
Interplanetary and magnetospheric electric fields during geomagnetic storms: what is more important, steady-state fields or fluctuating fields?
复制标题
地磁暴期间的行星际和磁层电场：稳态场和脉动场哪个更重要？
DOI：
10.1016/s1364-6826(00)00176-0
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发表时间：
2001
影响因子：
1.9
通讯作者：
Y. Kamide
中科院分区：
文献类型：
--
作者：
Y. Kamide
在强烈的磁暴期间，大部分Dst方差可以通过太阳风中大尺度电场的变化来再现。连续的亚暴（换句话说，磁层电场）是否在暴时环电流粒子的振荡中起直接作用，一直是争论的主题。这篇简短的评论提出，在磁暴期间，行星际电场的准稳态分量在增强环电流方面很重要，而太阳风电场的变化或波动则是引发磁层亚暴的原因。因此，就像在一个“思想”实验中一样，如果要控制太阳风，即，为了产生纯粹稳定的向南行星际磁场（IMF），结果将是一场没有亚暴扩张发生的地磁暴。
Most of the Dstvariance during intense geomagnetic storms can be reproduced by changes in large-scale electric fields in the solar wind. Whether successive substorms (in other words, magnetospheric electric fields) play a direct role in the energization of storm-time ring current particles is the subject of continuing controversy. This short review proposes that, during magnetic storms, the quasi-steady component of the interplanetary electric fields is important in enhancing the ring current, while changes, or fluctuations, in the solar wind electric fields are responsible for initiating magnetospheric substorms. Thus, as in a “thought” experiment, if one were to control the solar wind, i.e., to generate purely steady southward interplanetary magnetic field (IMF), the result would be a geomagnetic storm during which no substorm expansions take place.