Japan Geoscience Union Meeting 2024

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[J] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-CG Complex & General

[A-CG40] Dynamics of Oceanic and Atmospheric Waves, Vortices, and Circulations

Wed. May 29, 2024 1:45 PM - 3:00 PM 106 (International Conference Hall, Makuhari Messe)

convener:Yohei Onuki(Research Institute for Applied Mechanics, Kyushu University), Yukiharu Hisaki(University of the Ryukyus), Norihiko Sugimoto(Keio University, Department of Physics), Takuro Matsuta(Faculty of Env.Earth Science, Hokkaido University), Chairperson:Yohei Onuki(Research Institute for Applied Mechanics, Kyushu University), Yukiharu Hisaki(University of the Ryukyus), Norihiko Sugimoto(Keio University, Department of Physics), Takuro Matsuta(Faculty of Env.Earth Science, Hokkaido University)

2:00 PM - 2:15 PM

[ACG40-02] Turbulence and cloud droplets in cloud micro-physics simulator

★Invited Papers

*Izumi Saito1, Takeshi Watanabe1, Toshiyuki Gotoh2,1 (1.Nagoya Institute of Technology, 2.Keio University)

Keywords:cloud, turbulence, cloud droplets, direct numerical simulation

Cloud and turbulence are important keys in weather forecasting and climate prediction, yet our knowledge of them is very limited. Inside cloud the turbulent air flow transfers, mixes, and entrains heat, vapor, aerosols, ices, cloud droplets, and rain drops. At the same time, these modify the turbulent flow at very wide range of scales, which is a highly non-linear non-equilibrium complex system, cloud turbulence. To tackle this difficult problem, we developed “cloud micro-physics simulator,” a direct numerical simulation (DNS) model for the seamless simulation of turbulence and the evolution of cloud droplets to rain drops in a turbulent cloud environment from a first principle. In this talk, I provide an overview of the recent progress and result of cloud micro-physics simulator, including the effect of turbulence on condensation and collision growth of cloud droplets, comparison with the cloud chamber experiment, and the effect of droplets on turbulent fluctuations.