Multiple Technique Observations of the Ionospheric Responses to the 21 June 2020 Solar Eclipse
Multiple Technique Observations of the Ionospheric Responses to the 21 June 2020 Solar Eclipse
复制标题
2020 年 6 月 21 日日食电离层响应的多种技术观测
DOI：
10.1029/2020ja028450
复制
发表时间：
2020-12
期刊：
影响因子：
--
通讯作者：
Liu Libo
中科院分区：
文献类型：
--
作者：
Zhang Ruilong;Le Huijun;Li Wenbo;Ma Han;Yang Yuyan;Huang He;Li Qiaoling;Zhao Xiukuan;Xie Haiyong;Sun Wenjie;Li Guozhu;Chen Yiding;Zhang Hui;Liu Libo
利用电离层探测仪、全球导航卫星系统（GNNS）接收机、COSMIC 2、DMSP和SWARM卫星等多仪器观测，研究了电离层对2020年6月21日环食的响应。日食过程中，在20-70°E的上午，总电子含量（TEC）略有下降，而在80-150°E的下午，TEC下降幅度最大。然而，最大的TEC消耗并没有发生在最大的遮蔽，但在日食期间保持接近运行全食的南部边缘和日食后的经过全食的北方边缘。NmF 2在110°E附近的变化规律与TEC相似。同时，在食区观测到一个向北的扰动场向等离子体漂移，在全食南侧120°E附近扰动变强。TEC和Swarm资料显示，赤道电离异常（EIA）峰在中午前后在~50-100°E赤道两侧增强，尽管北方峰仍在月球阴影中。COSMIC 2剖面显示，在~70°E的EIA峰附近，电子密度在~300-500 km高度处增强，在~300 km高度以下降低。Swarm观测记录到在77°E和96°E的日食区和共轭半球的电子温度下降。电场、中性风、热传导和半球间光电子输运的综合作用可能导致电离层对日食响应的复杂时空变化。
We investigate the ionospheric response to the 21 June 2020 annular solar eclipse using the multiinstrument observations including ionosondes, Global Navigation Satellite System (GNNS) receivers, COSMIC2, and DMSP and SWARM satellites. During the course of the eclipse, total electron content (TEC) decreased slightly in the morning at 20–70°E and largely in the afternoon at 80–150°E. However, maximum TEC depletion did not occur at the maximum obscuration, but stayed close to the southern edge of the running totality during the eclipse and near the northern edge of the elapsed totality after the eclipse. NmF2 showed the similar variation as TEC around 110°E. Meanwhile, a northward disturbance field‐aligned plasma drift was observed in the eclipse region and the disturbance became strong in the southern side of the totality around 120°E. The TEC and Swarm data revealed that the crests of the equatorial ionization anomaly (EIA) enhanced on both sides of the equator around noon in ~50–100°E although the northern crest was still in the Moon's shadow. The COSMIC2 profiles displayed the enhanced electron density in ~300–500 km altitudes and decreased density below ~300 km altitudes around the EIA crests in ~70°E. The Swarm observations recorded a drop in the electron temperature both in eclipse region and in conjugate hemisphere in 77°E and 96°E. The combined effect from the electric field, neutral wind, thermal conduction, and interhemispheric photoelectron transport might result in the complicated space and time variations of ionospheric responses to the eclipse.
登录
查看更多内容
2005 年 10 月 3 日日食期间共轭半球的电离层行为
影响因子：
1.9
作者：
H. Le;W. Wan;X. Yue;L. Liu
通讯作者：
L. Liu
影响因子：
--
作者：
F. Ding;W. Wan;B. Ning;Libo Liu;H. Le;Guirong Xu;Min Wang;Guozhu Li;Yiding Chen;Z. Ren;B. Xiong;L. Hu;X. Yue;B. Zhao;Fengqin Li;Min Yang
通讯作者：
F. Ding;W. Wan;B. Ning;Libo Liu;H. Le;Guirong Xu;Min Wang;Guozhu Li;Yiding Chen;Z. Ren;B. Xiong;L. Hu;X. Yue;B. Zhao;Fengqin Li;Min Yang
影响因子：
0.8
作者：
Libo Liu;W. Wan;J. Tu;Zhenan Bao
通讯作者：
Libo Liu;W. Wan;J. Tu;Zhenan Bao
影响因子：
5.2
作者：
Guozhu Li;B. Ning;Xiukuan Zhao;Wenjie Sun;L. Hu;Haiyong Xie;Kangkang Liu;K. Ajith
通讯作者：
Guozhu Li;B. Ning;Xiukuan Zhao;Wenjie Sun;L. Hu;Haiyong Xie;Kangkang Liu;K. Ajith
DOI：
10.1029/2019ja027348
发表时间：
2020-07
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
--
作者：
L. Jose;C. Vineeth;T. Pant;K. Kumar
通讯作者：
L. Jose;C. Vineeth;T. Pant;K. Kumar