Responses of the ionospheric electric field to the sheath region of ICME: A case study

Responses of the ionospheric electric field to the sheath region of ICME: A case study
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电离层电场对 ICME 鞘层区域的响应:案例研究

DOI:
10.1016/j.jastp.2010.03.004
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发表时间:
2011
影响因子:
1.9
通讯作者:
Xie, L.
Xie, L.
中科院分区:
地球科学4区
文献类型:
--
作者:
Wei, Y.;Guo, J.;Liu, Xiaocan;Hong, M.;Pu, Z.;Zong, Q-G.;Nagai, T.;Cao, X.;Wang, J.;Fu, S.;Xie, L.

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在2006年12月14日的风暴初始阶段,我们利用地面和天基磁场协调测量研究了电离层电场对ICME鞘层的响应。向暗方向的电离层脉冲增强了向西的对流电喷流和向东的赤道电离层电场。在地球同步轨道附近的原位磁测量表明,由于鞘区持续高的太阳风动压,地球磁层在白天持续被压缩,而在夜晚被拉伸得更像尾巴。压缩阻止了屏蔽电流的增加,从而引起电场穿透。
We have examined the response of ionospheric electric field to the ICME sheath with the coordinated ground- and space-based magnetic measurements during the initial phase of December 14, 2006 storm. The duskward IEF pulses enhanced the westward convection electrojet and the eastward equatorial ionospheric electric field. The in situ magnetic measurements in the vicinity of geosynchronous orbit suggested that the Earth’s magnetosphere was continuously compressed on the dayside and stretched to more tail-like on the nightside, due to the sustained high solar wind dynamic pressure in the sheath region. The compression prevented shielding current from increasing and then caused electric field penetration.
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