Auroral Omega Bands are a Significant Cause of Large Geomagnetically Induced Currents
Auroral Omega Bands are a Significant Cause of Large Geomagnetically Induced Currents
复制标题
极光欧米伽带是大地磁感应电流的重要原因
DOI：
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发表时间：
2020
影响因子：
5.2
通讯作者：
V. Selivanov
中科院分区：
文献类型：
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作者：
S. Apatenkov;V. Pilipenko;E. Gordeev;A. Viljanen;L. Juusola;V. Belakhovsky;Y. Sakharov;V. Selivanov
俄罗斯西北部地磁感应电流（GIC）网络探测到的最强地磁感应电流事件发生在2013年6月28日和29日磁暴的主要阶段。在04-07磁地方时（MLT）扇区，Kola半岛的330千伏变压器记录了极高的值，120 A。国防气象卫星计划（DMSP）航天器在南半球拍摄了一系列紫外线（UV）极光图像，并观测到多个欧米茄波段。基于国际极光地磁效应监测（IMAGE）磁力计网络的电离层等效电流揭示了一系列以0.5 ~ 2.5 km/s的速度向东移动的电流涡旋对，符合欧米茄带的电动力学方案。虽然相关电流系统的时间变化是缓慢的，但由于电流在方位角方向上的快速传播，ω波段可以负责强磁变化和GIC。
The strongest event of geomagnetically induced currents (GIC) detected by the North‐West Russian GIC network occurred during the main phase of the magnetic storm on 28 and 29 June 2013. Extremely high value, 120 A, was recorded in the 330 kV transformers on Kola Peninsula in the 04–07 magnetic local time (MLT) sector. The Defense Meteorological Satellite Program (DMSP) spacecraft took a sequence of ultraviolet (UV) auroral images in the southern hemisphere and observed multiple omega bands. The ionospheric equivalent electric currents based on the International Monitor for Auroral Geomagnetic Effects (IMAGE) magnetometer network reveal a sequence of current vortex pairs moving eastward with the speed of 0.5–2.5 km/s that fits to the electrodynamics scheme of omega bands. Although the temporal variations of the associated current system are slow, the omega bands can be responsible for strong magnetic variations and GIC due to fast propagations of currents in the azimuthal direction.
DOI：
10.1029/2019ja026794
发表时间：
2019-09
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
--
作者：
Mark J. Engebretson;V. Pilipenko;L. Ahmed;J. Posch;E. Steinmetz;M. Moldwin;Martin G. Connors
通讯作者：
Mark J. Engebretson;V. Pilipenko;L. Ahmed;J. Posch;E. Steinmetz;M. Moldwin;Martin G. Connors
影响因子：
3.3
作者：
V. Belakhovsky;V. Pilipenko;M. Engebretson;Y. Sakharov;Vasily Selivanov
通讯作者：
V. Belakhovsky;V. Pilipenko;M. Engebretson;Y. Sakharov;Vasily Selivanov