Associate Professor Masahiro Takagi

Area and Subject Taught Planetary Meteorology
Research Theme(s) Dynamics and radiative transfer process of the Venus atmosphere
Academic Degrees Ph. D., University of Tokyo
Keywords for Research Field Planetary Meteorology
Office Phone Number 075-705-1714
e-mail E-mail

Research Overview

Most planets in the solar system have atmospheres. In those atmospheres, various phenomena which are completely different from those in the terrestrial atmosphere have been observed. It is well known that the Venus atmosphere rotates much faster than the Venus rotation. This fast zonal flow is called “superrotation”.However, the generation and maintaining mechanism of the superrotation remains unknown. I am conducting theoretical study on the Venus atmosphere in order to elucidate the mechanism of the Venus atmospheric superrotation. I am also developing the cloud tracking method by which wind distributions can be estimated accurately from Venus cloud images.

Notable Publications and Works in the Last Three Years

  • H. Ando, N. Sugimoto, M. Takagi, H. Kashimura, T. Imamura, Y. Matsuda (2016), The puzzling Venusian polar atmospheric structure reproduced by a general circulation model, Nat. Commun., 7:10398, 10.1038/ncomms10398.
  • Sugimoto, N., M. Takagi, and Y. Matsuda (2014), Waves in a Venus general circulation model, Geophys. Res. Lett., 41, 7461-7467, 10.1002/2014GL061807.
  • Sugimoto, N., M. Takagi, and Y. Matsuda (2014), Baroclinic instability in the Venus atmosphere simulated by GCM, J. Geophys. Res. Planets, 119, 1950–1968, 10.1002/2014JE004624.
  • Imamura, T., T. Higuchi, Y. Maejima, M. Takagi, N. Sugimoto, K. Ikeda, and H. Ando (2014), Inverse insolation dependence of Venus' cloud-level convection, Icarus, 228, 181-188, 10.1016/j.icarus.2013.10.012
  • Hoshino, N., H. Fujiwara, M. Takagi, and Y. Kasaba (2013), Effects of gravity waves on the day-night difference of the general circulation in the Venusian lower thermosphere, J. Geophys. Res., 118, 1-12, 10.1002/jgre.20154
  • Sugimoto, N., M. Takagi, Y. Matsuda, Y. O. Takahashi, M. Ishiwatari, and Y.-Y. Hayashi (2013), Baroclinic modes in the atmosphere on Venus simulated by AFES, Theoretical and Applied Mechanics Japan, 61, 11-21, 10.11345/nctam.61.11