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外文期刊>Journal of Geophysical Research, A. Space Physics: JGR
>Highly localized unique electrodynamics and plasma irregularities linked with the 17 March 2015 severe magnetic storm observed using multitechnique common-volume observations fromGadanki, India
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Highly localized unique electrodynamics and plasma irregularities linked with the 17 March 2015 severe magnetic storm observed using multitechnique common-volume observations fromGadanki, India
In this paper we study equatorial electrodynamics and plasma irregularities linked with the 17 March 2015 severe magnetic storm in the Indian sector by using common volume observations made by the Gadanki Ionospheric Radar Interferometer, airglow imager, Digisonde, and GPS receiver established at Gadanki (13.5°N, 79.2°E). Observations show that with the initiation of the storm at ~06:00 UT on 17 March, which happened to be midday in the Indian sector, the low-latitude ionosphere responded in tune with the storm-induced electric field and by the sunset time the base of the F layer ascended to an altitude of 470 km with a peak upward velocity of 50ms~(-1) eventually manifesting equatorial plasma bubble and irregularities causing strong GPS scintillation. The most important finding found in this study is the confinement of plasma bubble and irregularities in a narrow longitude zone of 69°E–98°E. Results also show reversal of zonal drift of the irregularities from ~120ms~(-1) eastward drift to ~120ms~(-1) westward drift in a time span of ~30 min. Both observations are shown to be linked with very special electrodynamical conditions induced by the magnetic storm-related electric field in the dusk sector. Intriguing details of the longitudinally localized electrodynamics and plasma irregularities are discussed in terms of prompt penetration and disturbed dynamo electric field effects.
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机译：在本文中,我们研究赤道电动力学和等离子违规行为与172015年3月严重的磁暴在印度部门通过使用常见的观察由Gadanki电离层雷达干涉仪,大气光成像、Digisonde和GPS接收器建立在Gadanki(13.5°N, 79.2°E)。观察显示的起始在3月17日~ 06:00时UT风暴,这发生了中午在印度部门,低纬度电离层与回应storm-induced电场和日落时间的基础上提升到一个F层高度470公里的向上的速度峰值50 ~(1)女士最终展现赤道等离子体泡沫和违规行为导致强劲GPS闪烁。本研究中发现等离子体的约束泡沫和违规行为在一个狭窄的经度区69°E - 98°E。纬向漂移的违规行为~ 120 ms ~(1)向东漂移~ 120 ms ~ (1)向西漂移~ 30分钟的时间。观察与非常所示特殊electrodynamical条件引起的磁该州电场黄昏部门。纵向局部电动力学和等离子体的违规行为进行讨论发电机电气迅速渗透和不安场的影响。
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