Japan Geoscience Union Meeting 2023

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[E] Oral

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

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

Sun. May 21, 2023 3:30 PM - 4:45 PM 101 (International Conference Hall, Makuhari Messe)

convener: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), Yue Deng(University of Texas at Arlington), Chairperson:Yosuke Yamazaki(Leibniz Institute of Atmospheric Physics), Akinori Saito(Department of Geophysics, Graduate School of Science, Kyoto University)


3:45 PM - 4:00 PM

[PEM12-17] Numerical simulations of metallic ion density perturbations in sporadic E layers caused by gravity waves

*Lihui Qiu1,2, Yosuke Yamazaki2, Tao Yu1, Erich Becker3, Yasunobu Miyoshi4, Yifan Qi1, Tarique A Siddiqui2, Claudia Stolle2, Wuhu Feng5, Yu Liang1, Jin Wang1, Huixin Liu4 (1.CUG, China, 2.IAP, Germany, 3.Northwest Research Associates Inc., Boulder, USA, 4.Kyushu Univ. Japan, 5.Univ. of Leeds, Uk)

Keywords:sporadic E layer, wind shear, gravity waves

The ionospheric sporadic E (Es) layer is a thin and dense metallic ion layer that occasionally appears at altitudes between 95 and 125 km. The layer-forming process is controlled by the vertical wind shear that is closely linked to the atmospheric tides forced by solar radiation. The diurnal, semidiurnal, terdiurnal and quarterdiurnal variations in the Es layer occurrence rate have been revealed by observations. However, how the gravity wave affects the Es layer has not been well revealed. Using the 1-D Es layer model driven by neutral winds from the HIAMCM model (High Altitude Mechanistic general Circulation Model), this work simulated the physical process of the Es layer evolution modulated by gravity waves. The results show the short-period metallic ion density disturbance (1.5-3h) caused by gravity waves. The sporadic E layer can be destroyed or enhanced by gravity waves.