JaLCDOI 10.18926/ESR/47748
Title Alternative Characteristics of typhoon tracks and large-scale atmospheric fields associated with the typhoon approach to the Japan Islands in early summer
FullText URL esr_018_1_011_018.pdf
Author Hamamoto, Natsumi| Kato, Kuranoshin| Nakayama, Yuuki| Tsukamoto, Osamu|
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
Start Page 11
End Page 18
ISSN 1340-7414
language 日本語
Copyright Holders © 2011 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
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NAID 120003796476