Japan Geoscience Union Meeting 2025

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U (Union ) » Union

[U-13] Future of Earth and Planetary Sciences Boosted by Artificial Intelligence

Sun. May 25, 2025 10:45 AM - 12:15 PM Exhibition Hall Special Setting (1) (Exhibition Hall 7&8, Makuhari Messe)

convener:Hiromichi Nagao(Earthquake Research Institute, The University of Tokyo), Yukihiro Takahashi(Department of Cosmosciences, Graduate School of Science, Hokkaido University), Yusuke Iida(Niigata University), Masuo Nakano(Japan Agency for Marine-Earth Science and Technology), Chairperson:Hiromichi Nagao(Earthquake Research Institute, The University of Tokyo), Yukihiro Takahashi(Department of Cosmosciences, Graduate School of Science, Hokkaido University), Yusuke Iida(Niigata University), Masaru Nakano(Japan Agency for Marine-Earth Science and Technology)

11:15 AM - 11:35 AM

[U13-02] AI emulator and data assimilation of auroral current system

★Invited Papers

*Ryuho Kataoka1, Shin ya Nakano2, Shigeru Fujita2, Aoi Nakamizo3 (1.National Institute of Polar Research, 2.The Institute of Statistical Mathematics, 3.National Institute of Information and Communications Techonology)

Keywords:Machine learning, Space Weather Forecast, Aurora

Physics-based auroral simulations, such as Japanese REProduce Plasma Universe (REPPU) code, are not practically fast enough for the purpose of real-time space weather forecast, even using the designated super computers. Here we developed a million-times-faster “emulator” to surrogate the outputs of the physics-based simulation, using the machine-learning technique called Echo State Network. The newly developed emulator, the surrogate model for REPPU auroral Ionosphere version 2 (SMRAI2), enables us to realize the real-time space weather forecast of the auroral current system as well as emsemble forecast and data assimilation forecast.