岡山大学 地球科学研究報告
Published by Okayama University Earth Science Reports Editorial Committee

天気図上の梅雨前線出現域の変動と前線帯への下層南風域の東西スケールについて

中山 祐貴 Graduate School of Education, Okayama University
大和田 道雄 Department of Science, Aichi University of Education
池田 祥一郎 Faculty of Education, Okayama University
加藤 内藏進 Graduate School of Natural Science and Technology, Okayama University
抄録
Eastward extension of the Baiu front in relation to zonal scale of the area with strong low-level southerly wind toward the front was examined based on the operational surface weather maps and the NCEP/NCAR re-analysis data mainly for the mature Baiu period (15 June to 31 July) from 1991 to 2000. During that period, the Baiu front on the surface weather maps appeared from the Changjiang River Basim to the east of the Japan Islands accompanied by the strong low-level southerly wind toward it in a wide zonal scala(~3500km), in many cases. However, the situations when the appesrance of the Baiu front was limited to the western part of the Japan Islands or limited to its eastern part are sometimes found with relatively narrow zonal acale of the strong low-level southerly wind toward the front, although the appearance frequency of such cases was not so high. As such the present results illustrate the importance of the zonal scale of the subtropical high for the spatial activity of the Baiu front.
キーワード
variation of the Baiu front
southerly wind in the subtropical high area
zonal extension of the Baiu front
ISSN
1340-7414
NCID
AN10506284
NAID