A LABORATORY EXPERIMENT AND NUMERICAL-SIMULATION OF AN ISOLATED BAROTROPIC EDDY IN A BASIN WITH TOPOGRAPHIC-BETA

被引：12

作者：

MASUDA, A ^{[1
]}

MARUBAYASHI, K ^{[1
]}

ISHIBASHI, M ^{[1
]}

机构：

[1] KYUSHU UNIV, APPL MECH RES INST, KASUGA, FUKUOKA 816, JAPAN

来源：

JOURNAL OF FLUID MECHANICS | 1990年 / 213卷

关键词：

D O I：

10.1017/S0022112090002488

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An initial localized eddy was generated in a rotating tank by a source-sink method to study the behaviour of an isolated barotropic eddy on aβ-plane. The evolution of the eddy was compared with the laboratory experiments by Firing & BEARDSLEY (1976) and by Takematsu & KITA (1985, 1988), confirming the northwestward (southwestward) translation of a cyclonic (anticyclonic) isolated eddy due to nonlinear effects. Anticyclonic eddies were contrasted with cyclonic eddies in the tank experiment, showing a cyclonic-anticyclonic asymmetry due to the topographic β as a substitute for the planetary β. The fluid experiment was simulated well by numerical simulation based on the quasi-geostrophic vorticity equation. Numerical experiments verified the northwestward (southwestward) translation both for an initially Gaussian and initially Rankine-type isolated cyclonic (anticyclonic) eddy. © 1990, Cambridge University Press. All rights reserved.

引用

页码：641 / 655

页数：15

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