Horizontal variations of gravity wave activities in the lower stratosphere over Japan: A case study in the Baiu season 1991
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- Ogino Shin-Ya
- Radio Atmospheric Science Center, Kyoto University
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- Yamanaka Manabu D.
- Graduate School of Science and Technology, Kobe University
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- Shibagaki Yoshiaki
- Radio Atmospheric Science Center, Kyoto University
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- Shimomai Toyoshi
- Radio Atmospheric Science Center, Kyoto University
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- Fukao Shoichiro
- Radio Atmospheric Science Center, Kyoto University
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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.
Journal
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- Earth, Planets and Space
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Earth, Planets and Space 51 (2), 107-113, 1999
Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences
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Details 詳細情報について
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- CRID
- 1390001206509035648
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- NII Article ID
- 10003737272
- 130003955983
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- NII Book ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL BIB ID
- 4681737
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed