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

地上梅雨前線の南方の九州における 線状降水帯の集団の維持について (2001年6月19日頃の事例解析)

合田 泰弘 岡山大学大学院教育学研究科
加藤 内藏進 岡山大学大学院教育学研究科自然教育学系理科教育講座
塚本 修 岡山大学大学院自然科学研究科
抄録
A case study on persistent appearance of the ensemble of precipitation bands in the warm sector of the Baiu front in Kyushu District, the western part of Japan around 19 June 2001 was performed based on the operational observational data. Around 00UTC (09JST) 19 June when the Baiu front on the surface weather map was still located about a few 100kms to the north of Kyushu, the number and the total area of the meso-β or γ-scale line-shaped precipitation bands increased around Kyushu rapidly. These precipitation bands had been sustained there and gradually gathered each other to change into the Baiu frontal precipitation zone extending from the northern Kyushu to Seto-Naikai (Seto Inland Sea) around 09UTC (18JST) 19 June (the intense rainfall zone was still located in the warm sector of the Baiu front). Until ~09UTC (18JST) 19 June, the moist air flow with the latently unstable stratification had been sustained around Kyushu corresponding to the low-level southerly wind toward the surface Baiu front to the north of Kyushu. This large-scale situation would contribute greatly to the maintenance of the ensemble of the line-shaped precipitation bands in the warm sector of the Baiu front.
キーワード
ensemble of line-shaped precipitation bands
precipitation in the warm sector of the Baiu front
Baiu fronal rainfall
ISSN
1340-7414
NCID
AN10506284
NAID