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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第57巻 第1/2号 >


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Title: 富山湾における数日周期の風強制流速変動
Other Titles: Current Variations with Several-Day Period Caused by Wind in the Toyama Bay
Authors: 相木, 智一1 Browse this author
磯田, 豊2 Browse this author →KAKEN DB
小善, 圭一3 Browse this author
Authors(alt): Aiki, Tomokazu1
Isoda, Yutaka2
Syouzen, Keiichi3
Keywords: Toyama Bay
current variation
wind forcing
internal Kelvin wave
bottom-trapped shelf wave
Issue Date: Nov-2006
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Volume: 57
Issue: 1-2
Start Page: 9
End Page: 18
Abstract: Two-layer current measurements were carried out at the bay-head over the shelf of the Toyama Bay,from 24 February to 13 March 2002. The upper was set at 100m and lower at 300 m below the sea surface. Current fluctuations caused by wind variation with several-day period are observed. It is found that the phase difference between upper and lower current variations shows about 90 degree. Such fluctuations cannot be explained by a single baroclinic coastal-trapped wave (out of phase) and barotropic one (in phase). So, the generation and propagation of several-day period fluctuations forced by wind were investigated by using the numerical two-layer model. In result, the observed current fluctuations can be reasonably explained by two-type coastal-trapped waves simultaneously excited mainly by north-south wind variations. One is internal Kelvin wave propagated in the upper layer with phase velocity of about 1ms-1 and the other is the bottom-trapped shelf wave slowly propagated with phase velocity of about 0.25 ms-1.
Type: bulletin (article)
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第57巻 第1/2号

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