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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Contribution of storm time substorms to the prompt electric field disturbances in the equatorial ionosphere
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Contribution of storm time substorms to the prompt electric field disturbances in the equatorial ionosphere

机译：风暴的贡献时间亚暴的提示在赤道电场干扰电离层

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摘要

This study tries to bring out the fact that storm time substorms can compete and at times significantly contribute to the geomagnetically disturbed time prompt penetration electric field effects on low and equatorial latitudes. Observations of unusual equatorial plasma drift data from Jicamarca Unattended Long-term Investigations of the Ionosphere and Atmosphere during two space weather events show that substorms can induce both eastward and westward penetration electric fields under steady southward interplanetary magnetic field (IMF B_z) conditions. During the first event on 2 January 2005, the enhancement of the daytime eastward electric field over Jicamarca due to substorm is found to be comparable with the Sq and interplanetary electric field (IEFy) generated electric fields combined. During the second event on 19 August 2006, the substorm is seen to weaken the daytime eastward field thereby inducing a westward field in spite of the absence of northward turning of IMF B_z (overshielding). The westward electric field perturbation in the absence of any overshielding events is observationally sparse and contrary to the earlier results. Further, the substorm-induced field is found to be strong enough to compete or almost nullify the effects of storm time IEFy fields. This study also shows quantitatively that at times substorm contribution to the disturbed time prompt electric fields can be significant and thus should be taken into consideration in evaluating penetration events over low latitudes.
机译：本研究试图将风暴的事实有时时间亚暴的可以和竞争极大地有助于眼睛迅速渗透电场干扰时间影响低,在中低纬度地区。观察不寻常的赤道等离子体漂移数据从Jicamarca长期无人值守调查的电离层和气氛在两个空间天气事件显示亚暴的能引起向东和向西渗透电场下稳定向南行星际磁场(IMF说是)条件。2005年,白天向东的增强电场在Jicamarca由于亚暴发现类似的与平方星际电场(IEFy)生成的电场的总和。2006年8月19日,亚暴被削弱从而导致白天向东字段尽管没有西字段向北的国际货币基金组织(IMF)说是(overshielding)。西电场的扰动没有任何overshielding事件根据观察稀疏,相反早些时候的结果。场发现足够强大或竞争几乎废弃IEFy风暴的影响时间字段。有时亚暴贡献打扰时间提示电场可以是巨大的因此应该考虑评估事件在低纬度地区渗透。

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