Observational evidence of thermospheric wind and composition changes and the resulting ionospheric disturbances in the European sector during extreme geomagnetic storms

被引:3
|
作者
Kim, Jeongheon [1 ]
Kwak, Young-Sil [1 ,2 ]
Lee, Changsup [3 ]
Lee, Jaewook [1 ,2 ]
Kam, Hosik [1 ]
Yang, Tae-Yong [1 ]
Jee, Geonhwa [3 ]
Kim, Yongha [4 ]
机构
[1] Korea Astron & Space Sci Inst, Space Sci Div, 776 Daedeok Daero, Daejeon 305348, South Korea
[2] Univ Sci & Technol, 217 Gajeong Ro, Daejeon 305350, South Korea
[3] Korea Polar Res Inst, Div Atmospher Sci, 26 Songdomirae ro, Incheon 21990, South Korea
[4] Chungnam Natl Univ, Coll Nat Sci, 99 Daehak Ro, Daejeon 34134, South Korea
基金
新加坡国家研究基金会;
关键词
Ionosphere responses; Geomagnetic storm; CMEs; Zonal and meridional winds; TID induced by TAD;
D O I
10.1051/swsc/2023025
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
On November 1st and 2nd, 2021, four Halo coronal mass ejections were ejected from the Sun, releasing billions of tons of high-energy particles into interplanetary space. These were directed towards the Earth and reached our planet on November 3rd and 4th, 2021, generating the first G3-level extreme geomagnetic storm since the beginning of the 25th solar cycle. In this study, we investigate the thermospheric and ionospheric responses in the European sector to a G3-level storm using various observational data from Fabry-Perot interferometer, Ionospheric Connection Explorer/Michelson Interferometer for Global High-resolution Thermospheric Imaging (ICON/MIGHTI), and Thermosphere Ionosphere Mesosphere Energetics and Dynamics/Global Ultraviolet Imager (TIMED/GUVI). The results show positive ionospheric storms in the middle and low latitudes of Europe which may be associated with the equatorward and westward neutral winds induced by heating in the polar region. In contrast, negative storms were detected at high latitudes in association with the increase in thermospheric density (upwelling). These two antithetical responses were confirmed by using European ionosonde and total electron contents (TEC) observation chains distributed over a wide range of latitudes. Finally, we, for the first time, attempt to identify the imaginary boundary line between the two responses.
引用
收藏
页数:14
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