台风“尼伯特”的电离层扰动分析An analysis of ionospheric disturbances associated with Nepartak typhoon by GNSS and COSMIC measurements
袁建刚,李旺,岳建平,潘轶,李震
摘要(Abstract):
针对台风运动过程中大气层与电离层的耦合效应问题,该文采用总电子含量与电子密度数据分析了台风"尼伯特"达到最大风速时刻的电离层变化情况。结果显示在台风达到最大时刻的当天,风眼处电离层电子含量显著降低,在台风附近的IGS测站处也有明显的电子含量负异常出现。电子含量异常空间分布图显示最大异常区域位于风眼的南侧,表明台风边缘处的电离层异常幅度要大于风眼处的异常幅度。电子密度三维模型显示在250~350km高度上,风眼附近有显著电子密度减弱现象,尤其在300km高度上,异常幅度达到-6~-8×105 el/cm3。诸多证据表明此次电子含量负异常与台风"尼伯特"造成的大气层-电离层耦合效应有关,这可为以后的台风-电离层扰动研究提供一定的参考。
关键词(KeyWords): 台风;尼伯特;电离层扰动;电子密度;最大风速;COSMIC;GNSS
基金项目(Foundation): 江苏省研究生创新工程项目(KYZZ16_0289);; 国家高水平公派研究生项目(201606710049);; 江苏省高等职业院校国内高级访问学者计划资助项目(2016GRFX012)
作者(Author): 袁建刚,李旺,岳建平,潘轶,李震
DOI: 10.16251/j.cnki.1009-2307.2019.03.011
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