Japan Geoscience Union Meeting 2021

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[E] Oral

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

[P-EM11] Coupling Processes in the Atmosphere-Ionosphere System

Fri. Jun 4, 2021 9:00 AM - 10:30 AM Ch.05 (Zoom Room 05)

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Loren Chang(Institute of Space Science, National Central University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Yue Deng(University of Texas at Arlington), Chairperson:Hidekatsu Jin(National Institude of Information and Communications Technology), Akinori Saito(Department of Geophysics, Graduate School of Science, Kyoto University)

9:30 AM - 9:45 AM

[PEM11-27] Validation of a revised version of whole atmosphere-ionosphere coupled model GAIA

*Hidekatsu Jin1, Yasunobu Miyoshi2, Chihiro Tao1, Hiroyuki Shinagawa1, Hitoshi Fujiwara3 (1.National Institude of Information and Communications Technology, 2.Kyushu University, 3.Seikei University)

Keywords:ionosphere, thermosphere, space weather, modeling, simulation, assimilation

Temporal and spatial variations in the ionospheric electron density and thermospheric mass density can have significant impacts on radio communications between ground and space, GNSS navigations, orbits of satellites and space debris, and so on. In order tonowcast and forecast upper atmospheric variations and disturbances, a whole atmospheric model, GAIA, has been developed. A number of minor and major revisions have been made to the model, including treatments of ionospheric energetics and chemical processes, solar irradiance inputs, parameter adjustments and so on. The revised version of GAIA is compared with thermosphere and ionosphere observations for its validation. We discuss the accuracy and uncertainty of the model as well as future improvements.