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Three‐Dimensional Characterization of Global Ionospheric Disturbances During the 15 January 2022 Tonga Volcanic Eruption

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Publicado en:Geophysical Research Letters vol. 52, no. 2 (Jan 28, 2025)
Autor principal: Zhai, Changzhi
Otros Autores: Zhang, Shun‐Rong, Yao, Yibin, Dong, Wenjun, Aa, Ercha, Kong, Jian, Yue, Dongjie, Chen, Yutian, Peng, Wenjie, Yu, Tingting
Publicado:
John Wiley & Sons, Inc.
Materias:
Tonga
Tomography
Lower atmosphere
Altitude
Azimuth
Wave propagation
Navigation
Volcanic eruptions
Acoustic waves
Gravity waves
Propagation
Wavelength
Traveling ionospheric disturbances
Volcanoes
Satellite observation
Wavelengths
Wind observation
Satellites
Lamb waves
Global navigation satellite system
Wind
Waves
Navigation satellites
Sound waves
Navigation systems
Ionospheric electron content
Volcanic activity
Navigational satellites
Atmospheric waves
Environmental
Acceso en línea:Citation/Abstract
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Resumen:The global 3‐dimensional structure of the concentric traveling ionospheric disturbances (CTIDs) triggered by 2022 Tonga volcano was reconstructed by using the 3‐dimensional computerized ionospheric tomography (3DCIT) technique and extensive global navigation satellite system (GNSS) observations. This study provides the first estimation of the CTIDs vertical wavelengths, ∼736 km, which was much larger than the gravity wave (GW) vertical wavelength, 240–400 km, estimated using ICON neutral wind observations. Notable trend with the variation of azimuth was also found in horizontal speeds at 200 and 500 km altitudes and differences between them. These results imply that (a) the global propagation of Lamb waves determined the arrival time of local ionospheric disturbances, and (b) the arriving Lamb waves caused vertical atmospheric perturbations that are not typical of GWs, resulting in local thermospheric horizontal wave propagation which is faster than the Lamb wave propagation at lower altitudes.
ISSN:0094-8276
1944-8007
DOI:10.1029/2024GL113129
Fuente:Science Database