SWARM卫星观测到的一次台风消亡产生的电离层扰动
本文基于SWARM卫星观测数据，利用差分、傅里叶分析、小波变换等算法提取分析了两颗卫星观测记录到的磁场和等离子体的扰动信号，研究了2014年1月29日形成的1402号台风“剑鱼”消亡时产生的电离层扰动及其传播过程. 结果表明，扰动信号的产生是突发的、瞬时的，在时空上与台风的消亡有良好的对应；扰动在各个参量上均有出现，且等离子体扰动早于磁场扰动；磁场扰动的主频突出，存在频移现象；异常信号向北传播过程中，在北纬40°附近，存在突然衰减和减速的情况. 分析认为，台风消亡能够产生一定的声重力波或次声波，并在电离层对磁场、等离子体等产生一定程度的扰动....
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| Veröffentlicht in: | 地球与行星物理论评 2021-01, Vol.52 (6), p.662-674 |
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| container_title | 地球与行星物理论评 |
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| creator | 杜晓辉 张学民 Du, Xiaohui Zhang, Xuemin |
| description | 本文基于SWARM卫星观测数据，利用差分、傅里叶分析、小波变换等算法提取分析了两颗卫星观测记录到的磁场和等离子体的扰动信号，研究了2014年1月29日形成的1402号台风“剑鱼”消亡时产生的电离层扰动及其传播过程. 结果表明，扰动信号的产生是突发的、瞬时的，在时空上与台风的消亡有良好的对应；扰动在各个参量上均有出现，且等离子体扰动早于磁场扰动；磁场扰动的主频突出，存在频移现象；异常信号向北传播过程中，在北纬40°附近，存在突然衰减和减速的情况. 分析认为，台风消亡能够产生一定的声重力波或次声波，并在电离层对磁场、等离子体等产生一定程度的扰动. |
| doi_str_mv | 10.19975/j.dqyxx.2021-030 |
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| subjects | Disturbance Fourier analysis Gravity waves Ionosphere Magnetic fields Satellites Typhoons Wavelet transforms |
| title | SWARM卫星观测到的一次台风消亡产生的电离层扰动 |
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