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Horizontal variations of gravity wave activities in the lower stratosphere over Japan: A case study in the Baiu season 1991

Earth, Planets and Space volume 51, pages 107–113 (1999)Cite this article

Abstract

Vertical wavenumber spectra are analyzed by using temperature, zonal wind and meridional wind data obtained with MU radar and radiosondes at the MU observatory in Shigaraki and with operational rawinsondes at five stations over Japan. The temperature and meridional wind spectral power densities of the dominant gravity wave increase with a decrease of latitude, whereas the zonal wind spectral power seems to have a maximum near the tropopausal jet stream axis. An analysis technique to estimate a characteristic value of intrinsic frequency from the wind and temperature vertical-wavenumber spectra is proposed. The different meridional distributions of spectral power densities for temperature, zonal wind and meridional wind possibly can be explained by a latitudinal distribution of the characteristic intrinsic frequency.

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Author notes

  1. Toyoshi Shimomai

    Present address: Solar-Terrestrial Environment Laboratory, Nagoya University, 3-13 Honohara, Toyokawa, Aichi, 442-8507, Japan

Authors and Affiliations

  1. Radio Atmospheric Science Center, Kyoto University, Uji, Kyoto, 611-0011, Japan

    Shin-Ya Ogino, Yoshiaki Shibagaki, Toyoshi Shimomai & Shoichiro Fukao

  2. Graduate School of Science and Technology, Kobe University, Nada-ku, Kobe, 657-8501, Japan

    Manabu D. Yamanaka

Authors
  1. Shin-Ya Ogino
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  2. Manabu D. Yamanaka
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  3. Yoshiaki Shibagaki
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  4. Toyoshi Shimomai
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  5. Shoichiro Fukao
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Correspondence to Shin-Ya Ogino.

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Ogino, SY., Yamanaka, M.D., Shibagaki, Y. et al. Horizontal variations of gravity wave activities in the lower stratosphere over Japan: A case study in the Baiu season 1991. Earth Planet Sp 51, 107–113 (1999). https://doi.org/10.1186/BF03352215

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  • DOI: https://doi.org/10.1186/BF03352215

Keywords

  • Gravity Wave
  • Zonal Wind
  • Meridional Wind
  • Spectral Ratio
  • Lower Stratosphere