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首页> 外文期刊>Geophysical Research Letters >Unusually long lasting multiple penetration of interplanetary electric field to equatorial ionosphere under oscillating IMF B-z
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Unusually long lasting multiple penetration of interplanetary electric field to equatorial ionosphere under oscillating IMF B-z

机译：在振荡的IMF B-z下，行星际电场对赤道电离层的异常持久的多次穿透

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摘要

During November 11 - 16, 2003, the interplanetary magnetic field (IMF) B-z oscillated between northward and southward directions, which suggests discontinuous magnetic reconnection associated with the multiple pulses-like reconnection electric field. The Jicamarca incoherent scatter radar (ISR) measurements of ionospheric zonal electric field showed similar fluctuations during this period. The high correlation coefficient of 0.71 between the reconnection electric field and equatorial zonal electric field during 125 hours suggests that the interplanetary electric field ( IEF) pulsively penetrated into the equatorial ionosphere due to the discontinuous magnetic reconnection. It is implied that the short lifetime (< 3 hours) dawn-dusk IEF pulses can penetrate into ionosphere without shielding, in other words, they may exhibit the "shielding immunity''. The averaged penetration efficiency is about 0.136 and highly local time-dependent. Furthermore, the intense AU and AL indices imply that the multiple electric field penetration is associated with a "High-Intensity Long-Duration Continuous AE Activity HILDCAA)".
机译：在2003年11月11日至16日期间，行星际磁场（IMF）B-z在北向和南向之间振荡，这表明与多个脉冲状重新连接电场相关的不连续磁性重新连接。电离层纬向电场的Jicamarca非相干散射雷达（ISR）测量在此期间显示出类似的波动。在125小时内，再连接电场与赤道纬向电场之间的相关系数高达0.71，这表明由于不连续的磁再连接，行星际电场（IEF）脉冲地穿透了赤道电离层。这暗示着短寿命（<3小时）的黎明黄昏IEF脉冲可以穿透电离层而没有被屏蔽，换句话说，它们可能表现出“屏蔽免疫力”，平均穿透效率约为0.136，并且局部时间很高。此外，强烈的AU和AL指数表示多重电场穿透与“高强度长时间持续AE活动HILDCAA”有关。

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