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Observing wave packets generated by solar terminator in TEC during typhoons

机译：台风期间观测太阳终结器在TEC中产生的波包

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摘要

In this work, we study ionospheric disturbances excited by the passage of the solar terminator (ST) during tropical cyclones, using total electron content (TEC) data. We have considered 16 intense tropical cyclones (typhoons) that acted in the northwest of the Pacific Ocean near the territory of Japan. We analyze two-dimensional distributions of the number of registered wave packets (WPs) depending on various parameters: local time, WP maximum amplitude, and distance to typhoon. It is shown that in most cases the maximum number of WPs is observed at a distance less than 500–1500 km from the typhoon center and near the time of evening solar terminator passage. For typhoons occurring during autumn periods, the maximum number of WPs is recorded at daytime, and, apparently, is not associated with ST. Distributions of the number of WPs depending on their amplitude have a similar form for all the cases considered, with a maximum of about 0.2 TECU. At the same time, for some typhoons there are a large number of WPs with amplitude up to 0.6–0.8 TECU, which is significantly higher than WP amplitudes under quiet conditions. We briefly discuss the mechanism of possible interaction between ionospheric disturbances caused by two different sources (tropical cyclones and ST passage).
机译：在这项工作中，我们使用总电子含量（TEC）数据研究了热带气旋期间太阳终结者（ST）的通过而激发的电离层扰动。我们已经考虑了16个强烈的热带气旋（台风），它们作用于日本西北部太平洋西北部。我们根据各种参数来分析登记波包（WP）的数量的二维分布：本地时间，WP最大振幅和距台风的距离。结果表明，在大多数情况下，在距台风中心不到500-1500 km的地方以及傍晚太阳终结者通过时，观测到最大的WPs。对于秋季发生的台风，白天记录的最大可湿性粉尘数量明显与ST无关。在所有考虑的情况下，WP数量取决于其幅度的分布具有相似的形式，最大约为0.2 TECU。同时，对于某些台风，有大量的WP振幅高达0.6–0.8 TECU，这大大高于安静条件下的WP振幅。我们简要讨论了由两种不同来源（热带气旋和ST通道）引起的电离层扰动之间可能相互作用的机制。

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