Diurnal Variation of Convective Activity and Precipitable Water over the "Semi-Basin" : Preliminary Study on the Mechanism Responsible for the Evening Convective Activity Maximum
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概要
- 論文の詳細を見る
The relationship between the diurnal variation of convective activity and precipitable water was examined in summer seasons using water vapor radiometer, C-band radar and radiosonde data. Convective activity over the "semi-basin" exhibited a diurnal variation with dual peaks at 15-17 JST and 19-20 JST, and the SSI (Showalter Stability Index) decreased from morning to evening due to the increase of water vapor in the lower layers associated with a thermally induced local circulation. When precipitable water exhibited a pronounced diurnal variation, the evening convective activity maximum (19-20 JST) was evident and cumulonimbus clouds had a tendency to develop over a limited region south and east of Mt. Haruna. On average the convective activity maximum occurred about an hour before the precipitable water maximum, and when precipitable water reached a maximum at an early (late) time, cumulonimbus clouds also formed at an early (late) time. Furthermore, the mechanism responsible for the evening convective maximum over the "semi-basin" is discussed, based on the results of the diurnal variation of convective activity and precipitable water.
- 社団法人日本気象学会の論文
- 2002-06-25
著者
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Iwasaki Hiroyuki
Laboratory Of Vital & Molecular Nutrition Department Of Biological Resource Chemistry Kyoto Pref
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Miki Takahiro
System Lsi Division Mitsubishi Electric Corporation
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Miki T
Faculty Of Education Gunma University
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Iwasaki H
Gunma Univ. Maebashi Jpn
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IWASAKI Hiroyuki
Faculty of Education, Gunma University
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MIKI Takahiro
Faculty of Education, Gunma University
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Miki Takahiro
Faculty Of Education Gunma University
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Iwasaki Hiroyuki
Faculty Of Education Gunma University
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