Research Description
I study spontaneous atmospheric gravity wave radiation from unsteady vortex motions, such as from jet-front systems, cyclones, and hurricanes, using simplified numerical models. I also study “super rotation” in the atmosphere of Venus using the atmospheric general circulation model for the Earth simulator, AFES-Venus.
Material
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Snapshot of spontaneous atmospheric gravity wave radiation (right panel) from an unsteady jet stream (left panel) in a simplified numerical model of the Earth’s atmosphere.
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Our data assimilation system will be the first to produce reanalysis data for the Venusian atmosphere.
Selected Journal Publications
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Sugimoto N., Takagi M., Matsuda Y. (2019) Fully Developed Superrotation Driven by the Mean Meridional Circulation in a Venus GCM. Geophysical Research Letters 46:1776–1784
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Kashimura H., Sugimoto N., Takagi M. et al. (2019) Planetary-scale streak structure reproduced in high-resolution simulations of the Venus atmosphere with a low-stability layer. Nature Communications 10: 23 (11pp) (プレスリリース)
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Sugimoto, N., Yamazaki, A., Kouyama, T., Kashimura, H., Enomoto, T., and Takagi, M.
(2017)
Development of an ensemble Kalman filter data assimilation system for the Venusian atmosphere.
Scientific Reports
Vol. 7, 9321, 9pp.
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Lebonnois, S., Sugimoto, N., and Gilli, G. (2016) Wave analysis in the atmosphere of Venus below 100-km altitude, simulated by LMD Venus GCM. Icarus 278: 38-51
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Sugimoto, N., and Plougonven, R. (2016) Generation and backreaction of spontaneously emitted inertia-gravity waves. Geophysical Research Letters 43: 1-7
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Ando, H., Sugimoto, N., Takagi, M., Kashimura, H., Imamura, T., and Matsuda, Y.
(2016)
The puzzling Venusian polar atmospheric structure reproduced by a general circulation model.
Nature Communications
7: 1-8
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Sugimoto, N.
(2015)
Inertia-gravity wave radiation from the merging of two co-rotating vortices in the f-plane shallow water system.
Physics of Fluids
27: 1-6
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Sugimoto, N., Ishioka K., Kobayashi H., and Shimomura Y.
(2015)
Cyclone-anticyclone asymmetry in gravity wave radiation from a co-rotating vortex pair in rotating shallow water.
Journal of Fluid Mechanics
772: 80-106
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Sugimoto, N., Takagi, M., and Matsuda, Y.
(2014)
Waves in a Venus general circulation model.
Geophysical Research Letters
41: 7461-7467
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Sugimoto, N., Ishioka K., and Ishii K. (2008) Parameter Sweep Experiments on Spontaneous Gravity Wave Radiation From Unsteady Rotational Flow in an F-plane Shallow Water System. Journal of Atmospheric Science 65: 234-249
Collaborative Research Recruitment
All kinds of numerical and theoretical studies related to Geophysical Fluid Dynamics and Planetary Atmospheric Sciences.
Hobby
Tennis, Climbing, Snowboarding, Skiing, Wine