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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Wave Steepening in Ionospheric Total Electron Density due to the 21 August 2017 Total Solar Eclipse
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Wave Steepening in Ionospheric Total Electron Density due to the 21 August 2017 Total Solar Eclipse

机译：波在电离层总电子趋陡由于2017年8月21日总太阳能密度Eclipse

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摘要

This study shows that a supersonic moon shadow of a total solar eclipse can steepen the ionospheric total electron content (TEC) wave on August 21, 2017. A data-adaptive method named Hilbert-Huang transform is employed to examine the nonlinear and non-stationary evolution of the waves. The results show that the TEC wave behaves as a traveling ionospheric disturbance before the totality appearance, turns later into steepening, and breaks eventually. A TEC wave with a period of ~40 min and wavelength of ~1,000 km propagates mainly in an east-southward direction before the totality appearance. The wave amplitude and scales, respectively, increases and reduce by near ~50% as the moon shadow approaches the western coast of the continental United States. The short-period TEC waves (period ~2 min) reveal that the wave may break eventually when the wave gets steeper. The steepness of the TEC wave is reconstructed according to the constructive interference.
机译：这项研究表明,超音速月亮的影子日全食可以变陡峭电离层波总电子含量(TEC) 8月21日,2017. 变换是用来检查的非线性和不稳定的波的进化。结果表明,TEC波表现得像一个旅行前电离层扰动整体外观,后来变成趋陡,最终和休息。~ 40分钟和波长的~ 1000公里的传播主要是在前一个east-southward方向整体外观。尺度,分别增加和减少~ 50%附近的月球阴影的方法美国大陆的西海岸。短周期波TEC(时间约2分钟)波可能最终会打破当波变得更陡。重建的建设性干扰。

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