The Dynamics of the Alfvénic Oval

The Dynamics of the Alfvénic Oval
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阿尔夫韦尼克椭圆形的动力学

DOI:
10.1016/j.jastp.2021.105616
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发表时间:
2021
影响因子:
1.9
通讯作者:
Keiling, Andreas
Keiling, Andreas
中科院分区:
地球科学4区
文献类型:
--
作者:
Keiling, Andreas

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极光椭圆形是一个成熟的概念,五十多年前提出。另一方面,Alfvénic椭圆是一个非常新的概念,在观测和数值研究中都有发现。这是全球Alfvénic椭圆的第一次审查,同时也定义了Alfvénic椭圆的第一,第二和第三层。重点在于全球Alfvénic椭圆形的大尺度动力学特性与AE指数,亚暴阶段,风暴阶段和太阳风/IMF条件的关系。对标称极光加速区上下记录的统计数据以及全球模拟研究的结果进行了审查。Alfvénic椭圆的极光椭圆的关系也进行了审查。这篇评论表明,Alfvénic椭圆是足够好的定义和调查,给它的名字,它表明,我们的理解允许预测的Alfvénic椭圆在各种条件下。
The auroral oval is a well-established concept, introduced more than five decades ago. The Alfvénic oval, on the other hand, is a very recent concept, which has been revealed in both observational and numerical studies. This is the first review of the global Alfvénic oval, while also defining primary, secondary and tertiary layers of the Alfvénic oval. The focus lies on the large-scale dynamic properties of the global Alfvénic oval in relation to theAEindex, substorm phases, storm phases and solar wind/IMF conditions. Statistical data recorded above and below the nominal auroral acceleration region are reviewed, together with results from global simulation studies. The Alfvénic oval's relation to the auroral oval is also reviewed. This review demonstrates that the Alfvénic oval is well enough defined and investigated to give it its name, and it demonstrates that our understanding allows for the prediction of the Alfvénic oval under various conditions.
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