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北美与东亚中纬地区电离层TEC变化的EOF建模和分析

姚新 赵必强 刘立波 万卫星

姚新, 赵必强, 刘立波, 万卫星. 北美与东亚中纬地区电离层TEC变化的EOF建模和分析[J]. 空间科学学报, 2015, 35(5): 556-565. doi: 10.11728/cjss2015.05.556
引用本文: 姚新, 赵必强, 刘立波, 万卫星. 北美与东亚中纬地区电离层TEC变化的EOF建模和分析[J]. 空间科学学报, 2015, 35(5): 556-565. doi: 10.11728/cjss2015.05.556
Yao Xin, Zhao Biqiang, Liu Libo, Wan Weixing. Comparison Of Ionospheric Total Electron Content Over North America And East Asia With Eof Analysis[J]. Chinese Journal of Space Science, 2015, 35(5): 556-565. doi: 10.11728/cjss2015.05.556
Citation: Yao Xin, Zhao Biqiang, Liu Libo, Wan Weixing. Comparison Of Ionospheric Total Electron Content Over North America And East Asia With Eof Analysis[J]. Chinese Journal of Space Science, 2015, 35(5): 556-565. doi: 10.11728/cjss2015.05.556

北美与东亚中纬地区电离层TEC变化的EOF建模和分析

doi: 10.11728/cjss2015.05.556 cstr: 32142.14.cjss2015.05.556
基金项目: 国家自然科学基金项目(41174138, 41131066)和国家重点基础研究项目(2011CB811405)共同资助
详细信息
    通讯作者:
    • 姚新,E-mail:zbqjz@mail.iggcas.ac.cn
  • 中图分类号: P352

Comparison Of Ionospheric Total Electron Content Over North America And East Asia With Eof Analysis

  • 摘要: 考察了北美(30°N-50°N, 140°W-50°W)与东亚 (42.5°N-57.5°N, 65°E-140°E) 中纬地区电离层总电子含量 (TEC)的变化. TEC数据来自美国喷气动力实验室(JPL)约15年的全球电离层图 (Global Ionospheric Map, GIM)数据. 利用经验正交函数(Empirical Orthogonal Functions, EOF)得到上述两地区前三阶本征模及相关时间系数, 分别约占TEC 总变化的99.57%和99.79%. 结果表明, 两地区前三阶EOF分量所表现出的TEC变 化基本一致. 第一阶EOF分量表现为受太阳活动调制的半年变化; 第二阶EOF 分量表现为关于零磁偏线的经向电子浓度东西不对称结构, 计算表明该结构 与受地磁偏角控制的热层纬向水平风引起的等离子体向上漂移密切相关; 第三 阶EOF分量表现为磁倾控制的热层子午向风引起的等离子体向上漂移影响.

     

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出版历程
  • 收稿日期:  2015-04-02
  • 修回日期:  2015-05-17
  • 刊出日期:  2015-09-15

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