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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第65巻 第2号 >

非成層期における沿岸海域の吹送流 : 海底摩擦を考慮した水路モデルとBoxモデル

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Title: 非成層期における沿岸海域の吹送流 : 海底摩擦を考慮した水路モデルとBoxモデル
Other Titles: Wind-driven current in coastal sea in the period of non-stratification : Channel and Box models with the bottom friction
Authors: 矢幅, 寛1 Browse this author
磯田, 豊2 Browse this author →KAKEN DB
Authors(alt): Yahaba, Hiroshi1
Isoda, Yutaka2
Keywords: Wind stress
Bottom stress
Dynamic balance
Vorticity balance
Issue Date: 20-Aug-2015
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: 65
Issue: 2
Start Page: 61
End Page: 76
Abstract: We re-examine the maintenance mechanism for the vortices in steady state, taking into considertion of the dissipation term including bottom stress : τb under the forced conditions with a constant and shear wind stress along the channel axis. In case of channel-topography without the bay-head, the flow pattern according to "dynamic balance" of τs=-τb forms. Therefore, the vortices are never produced even by the vortices supply from uniform wind stress due to the bathymetry torque. We also compare two models based on a single-layer and a multi-layer respectively. In case of closed box-topography, the essential flow pattern of vortices can be explained by "vorticity balance" of curl(τs/H)~-curl(τb/H)(H is a depth), and the divergence term generates the lower mode shelf wave and distorts the position of vortices.
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65巻 第2号

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