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行星际磁场对磁尾场向电流发生率的影响

程征伟 史建魁 张子迎 刘振兴

程征伟, 史建魁, 张子迎, 刘振兴. 行星际磁场对磁尾场向电流发生率的影响[J]. 空间科学学报, 2013, 33(4): 396-402. doi: 10.11728/cjss2013.04.396
引用本文: 程征伟, 史建魁, 张子迎, 刘振兴. 行星际磁场对磁尾场向电流发生率的影响[J]. 空间科学学报, 2013, 33(4): 396-402. doi: 10.11728/cjss2013.04.396
CHENG Zhengwei, SHI Jiankui, ZHANG Ziying, LIU Zhenxing. Effect of Interplanetary Magnetic Field on the Field-aligned Currents Occurrence in the Magnetotail[J]. Journal of Space Science, 2013, 33(4): 396-402. doi: 10.11728/cjss2013.04.396
Citation: CHENG Zhengwei, SHI Jiankui, ZHANG Ziying, LIU Zhenxing. Effect of Interplanetary Magnetic Field on the Field-aligned Currents Occurrence in the Magnetotail[J]. Journal of Space Science, 2013, 33(4): 396-402. doi: 10.11728/cjss2013.04.396

行星际磁场对磁尾场向电流发生率的影响

doi: 10.11728/cjss2013.04.396
基金项目: 国家自然科学基金项目(41274146, 41074114)和国家重点实验室专项基金共同资助
详细信息
    作者简介:

    程征伟, zwcheng@spaceweather.ac.cn

  • 中图分类号: P353.2

Effect of Interplanetary Magnetic Field on the Field-aligned Currents Occurrence in the Magnetotail

  • 摘要: 利用Cluster卫星的磁场和等离子体探测数据, 研究了行星际磁场(IMF)时钟角(clock angle) Φ和锥角(cone angle) θ对磁尾等离子体片边界层(PSBL)区场向电流发生率的影响. 当时钟角Φ >0时, 磁尾场向电流 的发生率较高, 这表明磁尾场向电流的发生与昏向太阳风条件更为密切; 当 90°<|Φ|<180°时, 场向电流的发生率较高, 这表明 场向电流的发生与南向IMF更为密切. 当锥角θ <30°时(即IMF与 日地连线夹角较小时)场向电流的发生率较低. 而当θ> 30°时, 场向电流在90°<|Φ|<180°的情况下发生率明显增大, 这说明南向IMF情况下, 场向电流发生率明显增大. 但是当|Φ|<90°时 (北向IMF情况下), 尽管θ很大, 场向电流的发生率并未明显增大. 当θ>70°时, 且在140°< < i>Φ<160°的行星 际磁场条件下, 磁尾等离子体片边界层区场向电流的发生率最大.

     

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出版历程
  • 收稿日期:  2012-08-29
  • 修回日期:  2013-03-04
  • 刊出日期:  2013-07-15

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