极地研究

极地研究 ›› 2014, Vol. 26 ›› Issue (3): 324-330.DOI: 10.13679/j.jdyj.2014.2.324

• 研究论文 • 上一篇    下一篇

极隙区纬度Pc1-2波的统计分布特征

邱奕婷1,2 刘勇华2 赵浩峰1   

  1. 1南京信息工程大学，江苏南京 210044； 2中国极地研究中心，上海 200136
  • 收稿日期:2013-12-20 修回日期:2014-01-27 出版日期:2014-09-30 发布日期:2014-09-30
  • 通讯作者: 邱奕婷
  • 基金资助:

    上海市浦江人才计划项目;国家海洋局海洋公益项目

STATISTICAL CHARACTERISTICS OF Pc1-2 WAVES NEAR THE CUSP LATITUDES

QIU Yiting1,2, LIU Yonghua2, ZHAO Haofeng1   

  1.  
    1Nanjing University of Information Science and Technology, Nanjing 210044, China;
    2Polar Research Institute of China, Shanghai 200136, China
  • Received:2013-12-20 Revised:2014-01-27 Online:2014-09-30 Published:2014-09-30
  • Contact: Yi-Ting QIU

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摘要： 利用南极中山站和戴维斯站观测的感应式磁力计数据，运用互谱分析方法统计分析了2004年3、6、9、12月的Pc1-2波事件，研究了Pc1-2波出现频次、中心频率和振幅对季节和磁地方时的分布。结果共获得有效Pc1-2波事件2 932件，其中，出现在3、9月较多，分别占51.4%和26.1%，12月次之，占18.6%，6月最少，占3.8%。两站的Pc1-2波事件有59.8%出现在磁中午（0800—1000UT）附近，且在午后靠近磁中午的时候Pc1-2波的中心频率比在午前靠近磁中午的时候大，振幅则在0800UT时出现最大值；此外，在6月，Pc1-2波的平均中心频率最大，而平均振幅则最小。这些结果表明，极隙区纬度Pc1-2波的传播在很大程度上受电离层电导率的影响。

关键词: Pc1-2波, 极隙区, 发生率, 高纬

Abstract: We recorded induction magnetometer data from Zhongshan and Davis Stations in Antarctica, for March, June, September, and December in 2004. We used cross-spectrum analysis to statistically study Pc1-2 wave occurrence, center frequency, and amplitude variations with respect to the seasons and magnetic local time. Of 2 932 valid wave events, Pc1-2 waves had a higher occurrence in March (51.4%) and September (26.1%) than in December (18.6%) and June (3.8%), and occurred most frequently near the magnetic local noon (59.8% at 0800–1000 UT). The wave center frequency was higher post-noon than pre-noon and the wave amplitude reached a maximum at 0800 UT. The maximal center frequency and minimal amplitude occurred in June. These results suggest that Pc1-2 wave properties near the cusp latitudes are strongly influenced by ionospheric conductivity.

Key words: Pc1-2 wave, cusp, occurrence, high latitude