Numerical Modeling of the Concentric Gravity Wave Seeding of Low-Latitude Nighttime Medium-Scale Traveling Ionospheric Disturbances

Min Yang Chou, Charles C.H. Lin, Joseph D. Huba, Chuan Ping Lien, Chia-Hung Chen, Jia Yue, Loren C. Chang, P. K. Rajesh

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

The first-principles three-dimensional ionosphere model Naval Research Laboratory SAMI3/ESF is used to study the low-latitude nighttime medium-scale traveling ionospheric disturbances (MSTIDs) triggered by the typhoon-induced concentric gravity waves (CGWs) for the first time. Simulation results demonstrate that the electrodynamic coupling between CGWs and Perkins instability can initiate the rarely observed low-latitude nighttime MSTIDs by accelerating their growth rates. Both the simulations and observations show that the westward and westward/equatorward propagating CGWs with similar wavefront alignments to the Perkins instability could enhance the generation of MSTIDs rather than the northward propagating CGWs. The CGWs penetrating to the ionospheric F layer without severe dissipation can induce greater polarization electric fields to accelerate the Perkins instability via E × B drifts.

原文English
頁(從 - 到)6390-6399
頁數10
期刊Geophysical Research Letters
45
發行號13
DOIs
出版狀態Published - 2018 七月 16

All Science Journal Classification (ASJC) codes

  • 地球物理
  • 地球與行星科學(全部)

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