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 1:45 PM - 3:00 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:Thomas J Immel(University of California Berkeley), Loren Chang(Department of Space Science and Engineering, National Central University)


1:45 PM - 2:00 PM

[PEM12-11] Lower thermopsheric winds from ICON/MIGHTI and comparison with the UA-ICON model

★Invited Papers

*Yosuke Yamazaki1, Stolle Claudia1, Markus Kunze1, Tarique Siddiqui1, Brian Harding2 (1.Leibniz Institute of Atmospheric Physics at the Rostock University, 2.University of California, Berkeley)

Keywords:Thermosphere, ICON/MIGHTI winds, UA-ICON model

Neutral winds in the lower thermosphere have a significant impact on the ionosphere. For example, the neutral winds drive dynamo electric fields and currents at E-region altitudes, which can affect plasma drifts and density distributions in the F region. Also, large vertical wind shear in the lower thermosphere is known as the cause of metallic ion layers, which can disrupt radio communication. The Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument on the Ionospheric CONnections (ICON) mission measures Doppler shifts in airglow emissions from the thermosphere to derive neutral wind velocities. The latest version (v05) of the ICON/MIGHTI wind data is analyzed to reveal large-scale features of the lower-thermospheric winds (i.e., mean winds, tides, and planetary waves). The results are compared with the German whole atmosphere model, UA-ICON (Upper-Atmosphere extension of ICOsahedral Non-hydrostatic general circulation model), in order to highlight capabilities and limitations of the model.