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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第73巻 第1号 >


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Title: 奥尻島を想定した楕円島後流域の島陰渦列
Other Titles: Island-shaded Vortex Sequence formed behind the Elliptical Island, Assuming Okushiri Island
Authors: 藤居, 流1 Browse this author
磯田, 豊2 Browse this author →KAKEN DB
小林, 直人3 Browse this author →KAKEN DB
Authors(alt): Fujii, Yu1
Isoda, Yutaka2
Kobayashi, Naoto3
Keywords: island-shaded vortex
Okushiri Island
elliptical island
reduced gravity model
Issue Date: 4-Aug-2023
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: 73
Issue: 1
Start Page: 15
End Page: 26
Abstract: In this study, ADCP observations were carried out on a grid of ship routes with the expectation that the island-shaded vortex would be captured around Okushiri Island in summer. Although such snapshot observation did not reveal the vortex’s generation period, anti-clockwise vortex flows were indeed observed on the eastern side of the island, and a northward migration of its vortex was also inferred. The observed vortex could be easily reproduced by a reduced gravity model with an idealized elliptical island set up in the northward flow. The model experiments have newly shown the occurrence of alternating positive and negative vortices with two-periodicities, i.e., 2.7 days and its double cycle 5.4 days.
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73巻 第1号

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