【摘要】 为了分析台风中心区域的电离层异常扰动过程,本文利用CODE提供的全球GIM电离层TEC网格数据,借助滑动四分位距法对2016年超强台风"鲇鱼"发生期间的电离层TEC异常进行了探测和分析.对超强台风"鲇鱼"发生的7个时间段电离层时间序列进行了异常值探测,发现在台风发生前2天,电离层TEC出现异常.此次电离层TEC异常主要发生在当地时间的02:00到12:00,持续时间长达十个小时,台风中心区域最大异常值达到12TECU.台风中心区域附近上空和对应的磁赤道共轭区上空的电离层均出现异常现象,两区域异常现象基本呈现相同变化趋势,而台风中心区域的电离层异常扰动现象很可能是此次台风发生的前兆之一.更多还原

【Abstract】 Being a strong weather system in the troposphere, typhoons can excite gravity waves in the atmosphere and transmit energy and momentum to the ionosphere, causing ionospheric disturbances. In order to analyze the process of ionospheric abnormal disturbance in the central area of typhoon, The global GIM ionospheric TEC grid data provided by CODE and the sliding quartile-based process were used to analyze anomalies of ionospheric TEC during super typhoon Megi. Outliers of ionospheric time series of 7 periods were detected during super typhoon Megi, which showed that the ionosphere TEC was abnormal 2 days before the typhoon occurred. The ionospheric TEC anomaly mainly occured from 02:00 to 12:00, lasting for ten hours, and the peak value reaching 12 TECU occured in the central area of typhoon. Ionosphere showed abnormal phenomenon and the same trend over the center of typhoon, northeast direction and the conjugate area of magnetic equator. The abnormal disturbance phenomenon of ionosphere TEC over typhoon central region was likely to be one of the precursors of the typhoon occurred.更多还原