Multilayered sporadic‐E response to the annular solar eclipse on 21 June 2020
Multilayered sporadic‐E response to the annular solar eclipse on 21 June 2020
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对 2020 年 6 月 21 日日环食的多层零星响应
DOI：
10.1029/2020sw002643
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
B. Zhao
中科院分区：
文献类型：
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作者：
J. Wang;X. Zuo;Y. Y. Sun;T. Yu;Y. Wang;L. Qiu;T. Mao;X. Yan;N. Yang;Y. qi;J. Lei;L. Sun;B. Zhao
2020年6月21日下午，一个日环食的月影经过东亚，这是一个很好的机会来研究电离层对太阳辐射变化的快速响应。本文利用武汉（82.4%遮蔽率）、厦门（97.8%遮蔽率）和南宁（81.1%遮蔽率）电离层探测仪记录的高频回波资料，分析了华东地区遮蔽过程中散射E（Es）的变化。回波不仅显示了130公里以下的典型信号Eslayer的变化，而且首次显示了日食期间更高高度（130-190公里）的多层Eslayer。其中，多层Esis只在南宁观测到，而在其他两个站点观测到不同的Esis行为。研究了多层E的形成与月影中心路径附近E的抬升之间的关系。小尺度大气重力波在日食期间调制Es行为中起着关键作用。
A moon shadow of annular solar eclipse passed through East Asia in the afternoon on June 21, 2020, which was a good opportunity to study the rapid ionospheric response to the solar radiation variations. In the study, the high‐frequency echoes recorded by the ionosondes at Wuhan (82.4% obscuration), Xiamen (97.8% obscuration), and Nanning (81.1% obscuration) are analyzed to examine the variations in sporadic‐E(Es) during the obscuration over the East China area. The echoes show not only the variations in the typical signalEslayer below 130 km, but for the first time also the multilayeredEsat much higher altitudes (130–190 km) during the eclipse. Specifically, the multilayeredEsis only observed over Nanning, while differentEsbehaviors are observed in the other two stations. The relationship between the formation of the multilayeredEsand the upliftedEsnear the center path of the moon shadow are examined in the study. The small‐scale atmospheric gravity waves play a key role in modulating theEsbehaviors during the eclipse.