Long‐Lasting Response of the Global Thermosphere and Ionosphere to the 21 August 2017 Solar Eclipse
Long‐Lasting Response of the Global Thermosphere and Ionosphere to the 21 August 2017 Solar Eclipse
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DOI：
10.1029/2018ja025460
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
J. Lei;Tong Dang;Wenbin Wang;A. Burns;Binzheng Zhang;H. Le
中科院分区：
文献类型：
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作者：
J. Lei;Tong Dang;Wenbin Wang;A. Burns;Binzheng Zhang;H. Le
以往的研究致力于研究日食期间电离层和热层的响应，但全球电离层和热层的后响应还没有得到很好的量化。在这项研究中，我们第一次定量研究了全球电离层和热层系统对最近大美国日食的后响应，使用高分辨率，全球，耦合电离层-热层-电动力学模型。结果发现，电离层和热层的后响应是显着的，世界范围内，这是没有预料到的。具体地说，即使在日食结束后9小时，全球平均电离层总电子含量扰动约为0.2总电子含量单位，相应的中性温度和风的变化达到2 K和2 m/s。与日食相关的全球动力学和能量过程的变化促成了后日食期间电离层和热层的这种长期响应。
Previous studies have been devoted to examining the ionosphere and thermosphere response during the solar eclipse, but the posteclipse response of the global ionosphere and thermosphere has not been well quantified. In this study, for the first time, we quantitatively investigate the posteclipse response of the global ionosphere and thermosphere system to the recent Great American Solar Eclipse using a high‐resolution, global, coupled ionosphere‐thermosphere‐electrodynamics model. It was found that the posteclipse response of the ionosphere and thermosphere is significant and worldwide, which was not expected. Specifically, even 9 hr after the eclipse ended, the globally averaged ionospheric total electron content perturbations were about 0.2 total electron content unit, and the corresponding changes in neutral temperature and winds reached 2 K and 2 m/s. The changes in the global dynamic and energetic processes associated with the solar eclipse contributed to this long‐lasting response of the ionosphere and thermosphere during the posteclipse period.