CEDAR
Coupling, Energetics and Dynamics of Atmospheric Regions Program
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Traveling Ionospheric Disturbances of the 2022 Tonga Volcano Eruption Observed by Ground-based GNSS Receivers in Taiwan and Japan

Yu-Chieh
Huang
Department of Space Science and Engineering, National Central University
Abstract text

On January 15, 2022, at 04:05 UTC, the Tonga volcano eruption triggered traveling ionospheric disturbances (TIDs) propagating all over the world. The rate of total electron content (rTEC) derived by GNSS (Global Navigation Satellite System) receiving stations has been employed to observe TIDs in Taiwan and Japan. Results show that the TIDs in Lamb modes can induce the eastward dynamo electric fields which then uplift the ionosphere, enhance the plasma instability, and significantly fluctuate rTECs. Doppler frequency shifts recorded by CW-HF (continuous wave-high frequency) Doppler sounding systems, which consist of 5 sounding frequencies and 9 receiving stations in Taiwan together with rTEC fluctuations are examined to have a better understanding on responses of the ionosphere to the Lamb waves induced by TIDs of the 2022 Tonga Volcano Eruption.

Authors
Yu-Chieh Huang1, Tien-Chi Liu1, and Jann-Yenq Liu1,2,3

1Department of Space Science and Engineering, National Central University, Taiwan
2Center for Astronautical Physics and Engineering, National Central University, Taiwan
3Center for Space and Remote Sensing Research, National Central University, Taiwan
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Poster category
COUP - Coupling of the Upper Atmosphere with Lower Altitudes
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