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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第70巻 第1号 >


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Title: 津軽海峡大間崎背後の負の水平シアー流で引き起こされる鉛直循環流
Other Titles: Vertical circulation induced by negative shear flow at the downside of Ooma-zaki in the Tsugaru Strait
Authors: 浅野, 竜太1 Browse this author
磯田, 豊2 Browse this author →KAKEN DB
小林, 直人3 Browse this author →KAKEN DB
中村, 知裕4 Browse this author →KAKEN DB
伊藤, 薫5 Browse this author
Authors(alt): Asano, Ryuta1
Isoda, Yutaka2
Kobayashi, Naoto3
Nakamura, Tomohiro4
Itoh, Kaoru5
Keywords: Tsugaru Strait
Gradient flow balance
Vorticity balance
Vertical circulation
Issue Date: 24-Aug-2020
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
Journal Title(alt): Bulletin of Fisheries Sciences, Hokkaido University
Volume: 70
Issue: 1
Start Page: 63
End Page: 76
Abstract: A new type of mechanism for the generation of vertical circulation is revealed with the use of numerical experiments for the bended channel model. In the steady passage-flow experiment with a flat bottom and no bottom friction, a remarkable vertical circulation is formed only at the downside of bended corner where a negative horizontal shear flow dominates. Specifically, we call this type circulation “Negative Shear induced Vertical Circulation (NSVC)”, which is caused through the dynamical unbalance of gradient flow and the vorticity balance between the lateral vorticity advection and the sea surface divergence. A field observation was carried out around the Ooma-zaki area in the eastern Tsugaru Strait to confirm an enhanced downward flow expected by the realistic experiment including the bottom slope and friction. The spatial istributions of water temperature support the existence of this downward motion.
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70巻 第1号

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