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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
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) |
URI: | http://hdl.handle.net/2115/59781 |
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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