JaLCDOI 10.18926/ESR/49212
Sort Key 8
Title Alternative A case study on persistent appearance of the ensemble of precipitation bands in the warm sector of the Baiu front in the western Japan around 19 June 2001
FullText URL esr_019_1_039_050.pdf
Author Goda, Yasuhiro| Kato, Kuranoshin| Tsukamoto, Osamu|
Abstract 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.
Keywords ensemble of line-shaped precipitation bands precipitation in the warm sector of the Baiu front Baiu fronal rainfall
Publication Title Okayama University Earth Science Report
Published Date 2012-12-26
Volume volume19
Issue issue1
Publisher 岡山大学理学部地球科学教室
Publisher Alternative Department of Earth Sciences, Faculty of Science, Okayama University
Start Page 39
End Page 50
ISSN 1340-7414
NCID AN10506284
Content Type Departmental Bulletin Paper
language 日本語
Copyright Holders © 2012 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
Refereed False
NAID 120005232330
Eprints Journal Name esr
JaLCDOI 10.18926/ESR/52166
Sort Key 5
Title Alternative A case study on the rainfall distribution over the Japan Islands associated with the approach of Ty0423 in late October (Comparison with that for Ty0418)
FullText URL esr_020_1_013_024_rev.pdf
Author Satake, Ai| Kato, Kuranoshin| Mori, Yoshinori| Goda, Yasuhiro| Ikeda, Shoichiro| Tsukamoto, Osamu|
Abstract Rainfall distribution in the Japan Islands associated with the approach of Typhoon No.23 around 20 October 2004 (referred to Ty0423, hereafter) showed considerably different features from those in late summer of this year. The present study examined the detailed rainfall features around the Japan Islands brought by Ty0423 and the atmospheric processes based on the operational observation data by the Japan Meteorological Agency (JMA), comparing with those in association with Ty0418 around 7 September 2004. During the stage when Ty0423 was approaching or landing on the western part of the Japan Islands, the areal mean precipitation from Kyushu to Kanto District attained much larger than that for Ty0418, with wider extension of the area with the large amount of precipitation. It is interesting that, although the intense rainfall was observed only at the upstream side of the mountain range from Kyushu to Honshu District for Ty0418 except for the area near its center, strong rainfall with 10~30 mm/h persisted in wider regions from the western to the eastern part of the Japan Islands, resulting in the considerably large total rainfall for Ty0423. As for the case for Ty0423, the surface front with stable frontal surface was located just to the east of the Ty0423 center just before its landing at the Japan Islands. Thus, the huge moisture inflow mainly in the eastern region from the typhoon center seems to be redistributed widely over the Japan Islands area associated with the large-scale convergence around the stable frontal surface. In late October, the colder air associated with the high pressure system in the eastern Siberia can cover the northern part of the Japan Sea area as the seasonal march. Such basic field might be favorable for sustaining the synoptic-scale front just around the southern coast of the Japan Islands, even when the strong southerly wind invades associated with the typhoon approach there.
Keywords Ty0423 Ty0418 rainfall in Japan associated with a typhoon in mid-autumn effects of a typhoon on the synoptic climatology in Japan in October
Note ※p.18第7図が左右逆であったのを修正(Figure of the left and the right in p.18 FIG.7 was supposed to reverse. This version was corrected.)
Publication Title Okayama University Earth Science Report
Published Date 2013-12-27
Volume volume20
Issue issue1
Publisher 岡山大学理学部地球科学教室
Publisher Alternative Department of Earth Sciences, Faculty of Science, Okayama University
Start Page 13
End Page 24
ISSN 1340-7414
NCID AN10506284
Content Type Departmental Bulletin Paper
language 日本語
Copyright Holders © 2013 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
Refereed False
NAID 120005394594
Eprints Journal Name esr