Conjugate Effect of the 2011 Tohoku Reflected Tsunami-Driven Gravity Waves in the Ionosphere

Min Yang Chou, Jia Yue, Charles C.H. Lin, P. K. Rajesh, N. M. Pedatella

研究成果: Letter同行評審

3 引文 斯高帕斯(Scopus)

摘要

This study presents the conjugate ionospheric disturbances triggered by the 2011 Tohoku-Oki reflected tsunami oceanic waves using the ground-based Global Navigation Satellite System (GNSS) total electron content (TEC) observations. We found that the equatorward and westward propagating nighttime medium-scale traveling ionospheric disturbances (MSTIDs) occurred over Japan and Australia simultaneously following the tsunami oceanic waves reflected by the Emperor Seamount Chain in the northern hemisphere. The atmospheric gravity waves driven by reflected tsunami oceanic waves are hypothesized to be the source to trigger the conjugate MSTIDs by transporting the polarization electric fields along the field line to the conjugate hemisphere. Moreover, only the southwestward propagating MSTIDs have this conjugate effect, which could be due to the wavefront orientation. The Perkins instability could also be involved in the interhemispheric coupling process. This study provides the first observational evidence that the reflected tsunami can induce conjugate ionospheric disturbances through electrodynamic forcing.

原文English
文章編號e2021GL097170
期刊Geophysical Research Letters
49
發行號3
DOIs
出版狀態Published - 2022 2月 16

All Science Journal Classification (ASJC) codes

  • 地球物理
  • 地球與行星科學(全部)

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