Effect of scalar nonlinearity on zonal flow generation by Rossby waves

被引：8

作者：

Mikhailovskii, A. B.

Lominadze, J. G.

Erokhin, N. N.

Erokhin, N. S.

Smolyakov, A. I.

Tsypin, V. S.

机构：

[1] Brazilian Ctr Phys Res, BR-22290180 Rio De Janeiro, Brazil

[2] Russian Res Ctr, Kurchatov Inst, Inst Nucl Phys, Moscow 123182, Russia

[3] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

[4] Russian Acad Sci, Inst Astron, Moscow 119017, Russia

[5] Kharadze Abastumani Natl Astrophys Observ, GE-0160 Tbilisi, Georgia

[6] State Univ, Moscow Phys Engn Inst, Moscow 115409, Russia

[7] Inst Space Res, Moscow 117810, Russia

[8] Univ Saskatchewan, Saskatoon, SK S7N 5E2, Canada

来源：

PHYSICS LETTERS A | 2007年 / 369卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/j.physleta.2007.04.093

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Effects of scalar nonlinearity on the generation of zonal flow by Rossby waves in shallow rotating fluid are considered. Zonal flows are generated via the action of Reynolds stress due to vector nonlinearity together with the effects of scalar nonlinearity. It is shown that the scalar nonlinearity reduces the amplitude threshold of the zonal flow instability. In addition, it increases the range of wave vectors of unstable modes subjected to the instability. The growth rate of the instability as a function of the spectrum of primary waves is calculated. The spectrum is assumed to be arbitrary with emphasizing the case of two monochromatic waves. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：218 / 221

页数：4

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