Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1995-09-01 |
タイトル |
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タイトル |
INTERANNUAL VARIABILITY OF PLANETARY WAVE ACTIVITY IN THE SOUTHERN HEMISPHERE |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ID登録 |
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ID登録 |
10.15094/00003901 |
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ID登録タイプ |
JaLC |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
記事種別(英) |
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en |
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ABSTRACT |
論文名よみ |
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その他のタイトル |
INTERANNUAL VARIABILITY OF PLANETARY WAVE ACTIVITY IN THE SOUTHERN HEMISPHERE |
著者名よみ |
アオキ, ヒロマツ
シオタニ, マサト
ヒロタ, イサム
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著者名(英) |
AOKI, Hiromatsu
SHIOTANI, Masato
HIROTA, Isamu
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著者所属(英) |
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en |
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Department of Geophysics, Faculty of Science, Kyoto University |
著者所属(英) |
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en |
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Division of Ocean and Atmospheric Sciences, Graduate School of Environmental Earth Science, Hokkaido University |
著者所属(英) |
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en |
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Department of Geophysics, Faculty of Science, Kyoto University |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
The interannual variability of the seasonal evolution in the southern hemisphere is investigated, using the global analyses for 1979-92 provided by the U.S. National Meteorological Center (NMC). As M. SHIOTANI et al. (Q. J. R. Meteorol. Soc., 119,531,1993) indicated, the seasonal march of the zonal mean wind and the wave-1 amplitude at the 1 hPa level can be classified into two categories-HLJ (high-latitude-jet) years and LLJ (low-latitude-jet) years-for the 1980's but not for other years. As a measure of planetary wave activity, we calculated wave-1 Eliassen-Palm (E-P) flux for HLJ years and LLJ years. In LLJ years, E-P vectors in the troposphere become large in April, that is earlier than in HLJ years when planetary waves grow in May. The development of this tropospheric wave-1 corresponds to the amplification of the wave-1 planetary waves at 1hPa level. In July-August, tropospheric E-P vectors in LLJ years are larger than in HLJ years. However, tropospheric planetary waves of smaller amplitude in HLJ years are likely to propagate well into the stratosphere compared with that of larger amplitude in LLJ years. This efficient propagation in HLJ years results in the larger E-P flux convergence at mid-latitude and the earlier movement of the westerly jet in the upper stratosphere than in LLJ years. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA10756213 |
書誌情報 |
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
巻 9,
p. 192,
発行日 1995-09
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出版者 |
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出版者 |
National Institute of Polar Research |