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Interesting Equatorial Plasma Bubbles Observed by All-Sky Imagers in the Equatorial Region of China
Kun Wu; Jiyao Xu; Wenbin Wang; Longchang Sun; Xiao Liu; Wei Yuan
作者部门空间科学部
发表期刊Journal of Geophysical Research-Space Physics
2017
卷号122期号:10页码:10596–10611
语种英语
关键词Airglow Rotating Epb Merging Process “i ” “s” And “y” Shaped Epbs
摘要This paper reports some interesting equatorial plasma bubbles (EPBs) on 4 and 5 October 2013 and 29 and 30 September 2013 observed by two all-sky imagers located in the magnetically equatorial region of Hainan (19.5°N; 9.5° geomagnetic latitude) and Guiping (23.8°N; 13.9° geomagnetic latitude), China. The case of 4 and 5 October 2013 shows the following: (1) EPBs had planar wave-like structures and their wavefronts were parallel to each other before midnight. (2) The angle between the wavefronts of those EPBs and the geomagnetic meridian were ~30°. (3) Near midnight, the higher-latitude part of one EPB suddenly began to rotate with a large eastward zonal drift, resulting in an unusual C-shaped EPB that was observed for the first time by an all-sky imager. (4) After midnight, one EPB merged into another EPB and formed an integrated EPB. The other EPB case on 29 and 30 September 2013 shows the following: (1) The images captured the full evolution processes of an “I” shaped EPB with an angle of ~30° with respect to the geomagnetic meridian. The imagers also observed “S” and “Y” shaped EPBs. (2) The change of EPBs' shape was directly related to the change of EPBs' zonal drift velocities. (3) The angle between the I-shaped EPBs and the geomagnetic meridian was likely caused by the change of the latitudinal gradient of zonal neutral wind velocities and ionospheric conductivity. (4) The zonal velocity of each branch of the “Y” shape EPB was different, which could be related to the polarization electric fields within each branch.
收录类别SCI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6042
专题空间科学部
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Kun Wu,Jiyao Xu,Wenbin Wang,et al. Interesting Equatorial Plasma Bubbles Observed by All-Sky Imagers in the Equatorial Region of China[J]. Journal of Geophysical Research-Space Physics,2017,122(10):10596–10611.
APA Kun Wu,Jiyao Xu,Wenbin Wang,Longchang Sun,Xiao Liu,&Wei Yuan.(2017).Interesting Equatorial Plasma Bubbles Observed by All-Sky Imagers in the Equatorial Region of China.Journal of Geophysical Research-Space Physics,122(10),10596–10611.
MLA Kun Wu,et al."Interesting Equatorial Plasma Bubbles Observed by All-Sky Imagers in the Equatorial Region of China".Journal of Geophysical Research-Space Physics 122.10(2017):10596–10611.
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