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Ionospheric Disturbances That Accompanied the Super Typhoon Lekima Event of 4 - 12 August 2019
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  • Leonid F. Chernogor,
  • Yu Zheng,
  • Kostyantyn Garmash,
  • Qiang Guo,
  • Victor T. Rozumenko,
  • Yiyang Luo
Leonid F. Chernogor
V.N. Karazin National University

Corresponding Author:[email protected]

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Yu Zheng
Qingdao University
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Kostyantyn Garmash
V.N. Karazin Kharkiv National University
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Qiang Guo
Harbin Engineering University
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Victor T. Rozumenko
V. N. Karazin National University
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Yiyang Luo
V.N.Karazin Kharkiv National University
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We acquired measurements with the oblique HF Doppler technique in the city of Harbin during the super typhoon Lekima event of 4 – 12 August 2019. The ionospheric response was observed by the Harbin Engineering University multifrequency multiple path coherent radio system in the People’s Republic of China. The maximum disturbance in the ionosphere was observed to occur during the day when the super typhoon Lekima energy gained a maximum value and when the super typhoon approached close to the ionospheric part of the radio-wave propagation paths. The magnitude of the ionospheric disturbances decreased with the distance between the super typhoon and propagation path midpoints. Both aperiodic (chaotic) and quasiperiodic disturbances were observed to accompany the super typhoon action in the ionosphere. The periods of the quasiperiodic disturbances were observed to be ~12 – 24 min. Such periods pertain to atmospheric gravity waves. The atmospheric gravity waves generated by the super typhoon gave rise to quasiperiodic variations in the electron density with relative amplitudes of ~3% to ~19%.