Simultaneous observations of small multi-scale structures in an auroral arc
Simultaneous observations of small multi-scale structures in an auroral arc
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极光弧中小型多尺度结构的同时观测
DOI：
10.1016/j.jastp.2010.01.014
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发表时间：
2010
影响因子：
1.9
通讯作者：
Dahlgren H
中科院分区：
文献类型：
--
作者：
Dahlgren H
极光弧可以产生小规模的扭曲，称为涡列或卷曲。其他常见的和更大的空间周期性扭曲是极光褶皱。在这个事件的研究中，我们提出了同时宽和窄场成像仪观测的第三种结构，甚至更小的空间尺度。边界起伏，或称“皱”，被观察到形成于极光弧的边缘，它们叠加在卷曲、褶皱上，或在极光切变时出现。这些起伏的波长通常小于3公里，振幅小于800米。观测到它们在弧的边缘移动，速度约为11 km/s。这些观测，多尺度变形，揭示了一个更复杂的极光弧结构比以前发现的。
Auroral arcs can develop small-scale distortions known as vortex streets or curls. Other common and somewhat larger spatially periodic distortions are auroral folds. In this event study we present simultaneous wide and narrow field imager observations of a third kind of structuring, on even smaller spatial scales. Boundary undulations, or “ruffs”, have been observed to form on the edge of an auroral arc and they occur superimposed on curls, folds or at times of auroral shear. The undulations typically have wavelengths of less than 3km and amplitudes of less than 800m. They are observed to move on the edge of the arc, with velocities of about 11km/s. These observations, with multi-scale deformations, reveal a much more intricate structuring of auroral arcs than previously found.
极光形态小尺度空间周期性畸变的调查
DOI：
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发表时间：
1998
期刊：
影响因子：
--
作者：
T. Trondsen;L. Cogger
通讯作者：
L. Cogger
剪切不稳定性：极光弧变形和反常动量传输
DOI：
--
发表时间：
1978
期刊：
影响因子：
--
作者：
A. Miura;Tetsuya Sato
通讯作者：
Tetsuya Sato