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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第60巻 第1号 >

エスチャリー循環流で駆動される表層時計回り水平渦流に関するFujiwara et al.(1997)理論解の改訂

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Title: エスチャリー循環流で駆動される表層時計回り水平渦流に関するFujiwara et al.(1997)理論解の改訂
Other Titles: Revision of Fujiwara et al. (1997)'s Theoretical Solution for Surface Anti-cyclonic Gyre Driven by Estuarine Circulation
Authors: 磯田, 豊1 Browse this author →KAKEN DB
Authors(alt): Isoda, Yutaka1
Keywords: estuarine circulation
upper mixed layer
anti-cyclonic gyre
potential vorticity conservation
Issue Date: 9-Mar-2010
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: 60
Issue: 1
Start Page: 1
End Page: 4
Abstract: Under the baroclinic process influenced by the Earth's rotation in enclosed coastal seas, Fujiwara et al. (1997) suggested that anti-cyclonic gyre (negative vorticity) was generated in the upper mixed layer by the horizontal divergence associated with upward entrainment, which was part of the estuarine circulation. They theoretically show that such vorticity (ζ) is close to a spatial uniform value of ζ=-f/2 (f>0 is the Coriolis parameter) at the steady state. However, this solution is basically given by infinitely small thickness of water column according to the potential vorticity conservation. We propose the revised solution in the finite upper mixed layer (H), i.e., ζ=-fx/[x+(u0/w0)H] is the increasing function of offshore distance from a river mouth (x) and depends on the ratio of river inflow velocity (u0) to upward entrainment velocity (w0).
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60巻 第1号

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