Global perspective of ionospheric traveling convection vortices: Case studies of two Geospace Environmental Modeling events
Global perspective of ionospheric traveling convection vortices: Case studies of two Geospace Environmental Modeling events
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电离层行进对流涡旋的全球视角：两次地球空间环境模拟事件的案例研究
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
E. Zesta
中科院分区：
文献类型：
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作者：
T. Moretto;E. Friis;H. Lühr;E. Zesta
基于大量的地基磁强计数据，研究了高纬度电离层移动对流涡旋的两个不同事件。介绍了一种新的显示技术，并将其用于分析。许多先前报道的这些事件的特征得到了证实，但也揭示了一些新的特征。这两个事件都表现出明显的中午后/中午前不对称。旋涡结构的许多子结构和复杂的动力学也很明显。其中一个事件被观察到与大尺度极地电离层对流系统的一个非常突然和强烈的变化密切相关。这两个事件之间的差异，不仅在这一点上，表明至少存在两类TCV事件，它们的区别需要全局分析。
Two very different events of high-latitude ionospheric traveling convection vortices (TCV) are studied on the basis of a very broad and dense collection of groundbased magnetometer data. A new display technique is introduced and used for the analyses. Many of the previously reported features of these events are confirmed, but some new features are revealed. Both events exhibit pronounced postnoon/prenoon asymmetry. Much substructure and complex dynamics of the vortex structures are also evident. One of the events is observed to be closely related to a very sudden and strong change in the large-scale polar ionospheric convection system. The difference between the two events, not only in this point, indicates the existence of at least two classes of TCV events, the distinction of which requires global analysis.