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ID 47748
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5
Title Alternative
Characteristics of typhoon tracks and large-scale atmospheric fields associated with the typhoon approach to the Japan Islands in early summer
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Author
Hamamoto, Natsumi
Kato, Kuranoshin Kaken ID researchmap
Nakayama, Yuuki
Abstract
The number of typhoons approaching the Japan Islands is much smaller in May and June than in August to September. However, some typhoons abnormally approach to the Japan Islands in May or June as in 2004. The present study investigated the characteristics of the typhoon tracks and the large-scale fields in May and June associated with the approach of typhoons to the Japan Islands. Climatologically speaking, typhoons are generally formed in the lower latitude in May and early June, and tend to turn to ENE-ward before they reach ~ 20N in May by the upper- and middle-level westerly wind. In June, the upper-level easterly wind associated with the Tibetan high seems to prevent typhoons from approaching to the Japan Islands. However, when the cell-type subtropical high and the deep westerly trough in its western side are formed with the SW-ly from the lower to the middle latitude, a favorable situation for the northward invasion of the typhoon can be realized in May. On the other hand, the formation of the barotropic-like subtropical high to the southeast of the Japan Islands seems to enable a typhoon to approach to the Japan Islands by the S-ly wind around the subtropical high.
Keywords
typhoon tracks in early summer
large-scale atmospheric fields in early summer
Publication Title
Okayama University Earth Science Report
Published Date
2011-12-26
Volume
volume18
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
11
End Page
18
ISSN
1340-7414
NCID
AN10506284
Content Type
Departmental Bulletin Paper
OAI-PMH Set
岡山大学
language
日本語
Copyright Holders
© 2011 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
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publisher
Refereed
False
NAID
Eprints Journal Name
esr