Japan Geoscience Union Meeting 2024

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[E] Poster

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

Thu. May 30, 2024 5:15 PM - 6:45 PM Poster Hall (Exhibition Hall 6, Makuhari Messe)

convener:Keisuke Hosokawa(Department of Communication Engineering and Informatics, University of Electro-Communications), Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Loren Chang(Department of Space Science and Engineering, National Central University)

5:15 PM - 6:45 PM

[PEM12-P13] A regional three-dimensional model of the sporadic E layers: their formation and evolution process

*Lihui Qiu1, Huixin Liu1 (1.Kyushu Univ.)

Keywords:sporadic E layers, Numerical simulation

Ionospheric sporadic E (Es) layers are thin metallic ion (mainly Fe+, Mg+ and Ca+) layers that occasionally form in the mesosphere and lower thermosphere (MLT) region. They can cause reflection, scattering, and fading of radio signals due to the sharp vertical density gradient, which consequently affects positioning, communication, and navigation systems. The occurrence rate and vertical movements of Es layers have been widely studied. However, the three-dimensional structure and movements of Es layers have not been well understood. In present study, we develop a regional 3-D Es layer model driven by WACCM-X, which can describe the formation and 3-D evolution process of Es layer. By comparing simulation results with the ionosonde observations, this study suggests that the horizontal structure of Es layer may have a wide range and a tilted configuration. Furthermore, the Es layer not only exhibits horizontal drift but also displays geographical development and retrogression. The 3-D Es layer model is helpful for understanding the evolution of Es layer.