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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Ionospheric scintillation over Antarctica during the storm of 5-6 April 2010
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Ionospheric scintillation over Antarctica during the storm of 5-6 April 2010

机译：电离层闪烁在南极洲上空2010年4月5 - 6的风暴

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摘要

On 5 April 2010 a coronal mass ejection produced a traveling solar wind shock front that impacted the Earth's magnetosphere, producing the largest geomagnetic storm of 2010. The storm resulted in a prolonged period of phase scintillation on Global Positioning System signals in Antarctica. The scintillation began in the deep polar cap at South Pole just over 40 min after the shock front impact was recorded by a satellite at the first Lagrangian orbit position. Scintillation activity continued there for many hours. On the second day, significant phase scintillation was observed from an auroral site (81°S) during the postmidnight sector in association with a substorm. Particle data from polar-orbiting satellites provide indication of electron and ion precipitation into the Antarctic region during the geomagnetic disturbance. Total electron content maps show enhanced electron density being drawn into the polar cap in response to southward turning of the interplanetary magnetic field. The plasma enhancement structure then separates from the dayside plasma and drifts southward. Scintillation on the first day is coincident spatially and temporally with a plasma depletion region both in the dayside noon sector and in the dayside cusp. On the second day, scintillation is observed in the nightside auroral region and appears to be strongly associated with ionospheric irregularities caused by E region particle precipitation.
机译：2010年4月5日日冕物质抛射了旅行太阳风冲击面前,受到影响地球的磁气圈,产生最大的2010年的地磁风暴。长时间的阶段上闪烁全球定位系统信号在南极洲。在极地冰冠深处闪烁开始南极激震前沿后超过40分钟影响被卫星在第一个记录拉格朗日轨道位置。持续几个小时。天,观察重要阶段闪烁从一个极光网站(81°S)postmidnight部门在协会亚暴。卫星提供的电子和离子降水期间南极地区地磁扰动。内容地图显示增强的电子密度卷入的极冠应对向南行星际磁场的转变。等离子体增强结构然后分开的光面等离子体和向南漂移。闪烁在第一天是重合的时空上的等离子体损耗在中午的光面部门和地区的光面尖端。在阴面极光区域似乎是密切相关的电离层不规则造成的地区粒子沉淀。

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