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神戸大学　理学研究科　惑星学専攻・惑星学科　Home　Page

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Yoshi-Yuki HAYASHI

hayashi 　Professor
 　 Graduate School of Science and Center for Planetary Science, Faculty of Science



Research Interests:

What becomes of the general circulation of the atmosphere of a planet, if its solar constant, its radius, its rotation rate, its gravitational acceleration and so on are different from those of the Earth? I am pursuing such an issue by observing an idealistic atmosphere generated virtually in a numerical computer with the help of collaborators distributed over the Internet. This is an effort to locate the atmospheric circulations of Earth, Mars, Venus and outer planets as particular realizations on a wide parameter space, and consequently to recognize necessity and/or contingency of those states. This is also an attempt to verify and deepen the understandings of the Earth's atmosphere, since all of the knowledge on the present Earth's atmosphere must be thrown out to speculate a possible atmospheric state which might be realized under the conditions of the planets other than the Earth, past or future of those planets, and virtual planets without any real substances. It may be worth notifying that, they are not unrealistic chimeras at all since many exosolar planets have been discovered.

Main Research Themes:

  • Geophysical fluid dynamics; wave and shear instability, dry and/or moist convection, rotating turbulence.
  • Structures of planetary atmospheres; thermal structures, convection and general circulations of the atmospheres.
  • Computation and information meteorology; development of simulation models for geophysical fluids and planetary atmospheres, development of analysis and visualization tools for multidimensional numerical data.

Recent Publications:　

  • How waves and turbulence maintain the super-rotation of Venus' atmosphere.
    Takeshi Horinouchi, Yoshi-Yuki Hayashi, Shigeto Watanabe, Manabu Yamada, Atsushi Yamazaki, Toru Kouyama, Makoto Taguchi, Tetsuya Fukuhara, Masahiro Takagi, Kazunori Ogohara, Shin-ya Murakami, Javier Peralta, Sanjay S. Limaye, Takeshi Imamura, Masato Nakamura, Takao M. Sato, Takehiko Satoh, Science 368(6489) 405-409 2020年4月
  • Noda, S., Ishiwatari, M., Nakajima, K., Takahashia, Y.O., Takehiro, S., Onishi, M., Hashimoto, G.L., Kuramoto, K., Hayashi, Y.-Y., The circulation pattern and day-night heat transport in the atmosphere of a synchronously rotating aquaplanet: dependence on planetary rotation rate. Icarus, 282, 1--18. (2017) http://dx.doi.org/10.1016/j.icarus.2016.09.004.
  • Noda, S., Ishiwatari, M., Nakajima, K., Takahashia, Y.O., Takehiro, S., Onishi, M., Hashimoto, G.L., Kuramoto, K., Hayashi, Y.-Y., The circulation pattern and day-night heat transport in the atmosphere of a synchronously rotating aquaplanet: dependence on planetary rotation rate. Icarus, 282, 1--18. (2017) http://dx.doi.org/10.1016/j.icarus.2016.09.004.
  • Yamashita, T., Odaka, M., Sugiyamac, K., Nakajima, K., Ishiwatari, M., Nishizawa, S., Takahashi, Y.O., Hayashi, Y.-Y., A Numerical Study of Convection in a Condensing CO2 Atmosphere under Early Mars-Like Conditions. J. Atmos. Sci., 73, 4151--4169. (2016) http://dx.doi.org/10.1175/JAS-D-15-0132.1
  • Nishizawa, S., Odaka, M., Takahashi, Y.O., Sugiyama, K., Nakajima, K., Ishiwatari, M., Takehiro, S., Yashiro, H., Sato, Y., Tomita, H., Hayashi, Y.-Y., Martian dust devil statistics from high$B!>(Bresolution large$B!>(Beddy simulations. Geohys. Res. Ret., 43, 4180--4188. (2016) http://dx.doi.org/10.1002/2016GL068896
  • Sugiyama, K., Nakajima, K., Odaka, M., Kuramoto, K., Hayashi, Y.-Y., Numerical simulations of Jupiter’s moist convection layer: structure and dynamics in statistically steady states. Icarus, 229, 71--91. (2014) http://dx.doi.org/10.1016/j.icarus.2013.10.016. 　　　
  • Nakajima, K., Yamada, Y., Takahashi Y. O., Ishiwatari, M., Ohfuchi, W., Hayashi, Y.-Y., The variety of spontaneously generated tropical precipitation patterns found in APE results. J. Met. Soc. Japan, 91A, 91-141. (2013)
  • Nakajima, K., Yamada, Y., Takahashi Y. O., Ishiwatari, M., Ohfuchi, W., Hayashi, Y.-Y.: The variety of forced atmospheric structure in response to tropical SST amonaly in the Aqua-planet experiments. J. Met. Soc. Japan, 91A, 143-193. (2013)
  • Ishiwatari, M., Toyoda, E., Morikawa, Y., Takehiro, S., Sasaki, Y., Nishizawa, S., Odaka, M., Otobe, N., Takahashi, Y. O., Nakajima, K., Horinouchi, T., Shiotani, M., Hayashi, Y.-Y., Gtool development group, "Gtool5": a Fortran90 library of input/output interfaces for self-descriptive multi-dimensional numerical data, Geosci. Model Dev., 5, 449-455. (2012) doi:10.5194/gmd-5-449-2012

  • list of papers (researchmap) are here


Academic Associations:　



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Department of Planetology, Graduate School of Science, Kobe University

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