JaLCDOI 10.18926/ESR/52166
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
Publication Title Okayama University Earth Science Report
Published Date 2013-12-27
Volume volume20
Issue issue1
Start Page 13
End Page 24
ISSN 1340-7414
language 日本語
Copyright Holders © 2013 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
NAID 120005394594
Title Alternative Toward Understanding of Regional Climate in East Asia around the Last Glacial Maximum with Attention to the Seasonal Cycle and Daily Meteorological Systems
FullText URL erc_028_017_027.pdf
Author Kato, Kuranoshin| Ikeda, Shoichiro| Abe, Kana|
Abstract Regional climate system in East Asia shows the characteristic seasonal cycle affected by the Asian monsoon with various types of its sub-systems. The seasonal cycle there is also related greatly to behaviors of the frontal zones which are the boundaries of these sub-systems. Since the variation of global-scale environment such as the global warming influences on each monsoon sub-system in rather different manner, it is necessary to understand the joint effects of these subsystems, in order to predict the regional climate change in East Asia in the global warming. In such research, it would be also useful to examine the features in the ice age, as an opposite extreme situation against the global warming. Thus the present paper will discuss some viewpoints in investigating the regional climate in the Last Glacial Maximum with attention to the seasonal cycle and daily meteorological systems.
Keywords Climate in East Asia Seasonal cycle Frontal zone Last Glacial Maximum
Publication Title 環境制御
Published Date 2006-12
Volume volume28
Start Page 17
End Page 27
ISSN 0917-1533
language 日本語
File Version publisher
JaLCDOI 10.18926/ESR/13855
Title Alternative 中国淮河流域付近の入梅前の時期における大気場や陸面状態の季節進行 (1998年の事例解析)
FullText URL ESR_12_31.pdf
Author Ikeda, Shoichiro| Kato, Kuranoshin| Tsukamoto, Osamu|
Abstract  Seasonal evolution of atmospheric and land surface conditions around the Huaihe River Basin in China in the pre-Meiyu stage of 1998 were examined, mainly based on the GAME re-analysis data. Around the Huaihe River Basin in China (just to the nront of the Changjiang River Basin), although the air temperature increased rapidly already in early June (the Meuyu front was located to the south of that region), the specific humidity did not increas so much at time. In addition, the latent heat supplied from the ground there decreased from late May to early June, compared to that before early May. The time mean southerly wind component across the low-level baroclinic Zone (although not so strong as in the mature stage of the Meiyu) invaded into Central Cjina during late April to early May. On the other hand, the relatively strong wind region once retreated southward in the middle of May associated with the onset of the Southeast Asian monsoon, and the calm wind region with frequent appearance of the surface high was seen around the Huaihe River Basin from late May to early June. Thus the present study shows that the Huaihe River Basin once experiences the rather drier stage just before the onset stage of the mature Meiyu there.
Keywords arid region in China and the Meiyu front seasonal evlution in East Asia Land surface condition around the Meiyu front
Publication Title Okayama University Earth Science Report
Published Date 2005-12-31
Volume volume12
Issue issue1
Start Page 31
End Page 37
ISSN 1340-7414
language 英語
Copyright Holders 岡山大学地球科学研究報告編集委員会
File Version publisher
NAID 120002310602