Nonlinear excitation of zonal flows by rossby wave turbulence

J T Mendonça, P K Shukla, R Bingham

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We apply the wave-kinetic approach to study nonlinearly coupled Rossby wave-zonal flow fluid turbulence in a two-dimensional rotating fluid. Specifically, we consider for the first time nonlinear excitations of zonal flows by a broad spectrum of Rossby wave turbulence. Short-wavelength Rossby waves are described here as a fluid of quasi-particles, and are referred to as the 'Rossbyons'. It is shown that Reynolds stresses of Rossbyons can generate large-scale zonal flows. The result should be useful in understanding the origin of large-scale planetary and near-Earth atmospheric circulations. It also provides an example of a turbulent wave background driving a coherent structure.
LanguageEnglish
Article number073038
Number of pages8
JournalNew Journal of Physics
Volume11
DOIs
Publication statusPublished - 23 Jul 2009

Fingerprint

planetary waves
turbulence
excitation
rotating fluids
atmospheric circulation
fluids
Reynolds stress
elementary excitations
kinetics
wavelengths

Keywords

  • instability
  • plasma
  • wave-kinetic
  • Rossby wave-zonal flow fluid turbulence
  • nonlinear excitations
  • zonal flows
  • Reynolds stresses
  • turbulent wave background

Cite this

@article{e7a3e48a672349ab9322be5e7ded266b,
title = "Nonlinear excitation of zonal flows by rossby wave turbulence",
abstract = "We apply the wave-kinetic approach to study nonlinearly coupled Rossby wave-zonal flow fluid turbulence in a two-dimensional rotating fluid. Specifically, we consider for the first time nonlinear excitations of zonal flows by a broad spectrum of Rossby wave turbulence. Short-wavelength Rossby waves are described here as a fluid of quasi-particles, and are referred to as the 'Rossbyons'. It is shown that Reynolds stresses of Rossbyons can generate large-scale zonal flows. The result should be useful in understanding the origin of large-scale planetary and near-Earth atmospheric circulations. It also provides an example of a turbulent wave background driving a coherent structure.",
keywords = "instability, plasma, wave-kinetic, Rossby wave-zonal flow fluid turbulence, nonlinear excitations, zonal flows, Reynolds stresses, turbulent wave background",
author = "Mendon{\cc}a, {J T} and Shukla, {P K} and R Bingham",
year = "2009",
month = "7",
day = "23",
doi = "10.1088/1367-2630/11/7/073038",
language = "English",
volume = "11",
journal = "New Journal of Physics",
issn = "1367-2630",

}

Nonlinear excitation of zonal flows by rossby wave turbulence. / Mendonça, J T; Shukla, P K; Bingham, R.

In: New Journal of Physics, Vol. 11, 073038, 23.07.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Nonlinear excitation of zonal flows by rossby wave turbulence

AU - Mendonça, J T

AU - Shukla, P K

AU - Bingham, R

PY - 2009/7/23

Y1 - 2009/7/23

N2 - We apply the wave-kinetic approach to study nonlinearly coupled Rossby wave-zonal flow fluid turbulence in a two-dimensional rotating fluid. Specifically, we consider for the first time nonlinear excitations of zonal flows by a broad spectrum of Rossby wave turbulence. Short-wavelength Rossby waves are described here as a fluid of quasi-particles, and are referred to as the 'Rossbyons'. It is shown that Reynolds stresses of Rossbyons can generate large-scale zonal flows. The result should be useful in understanding the origin of large-scale planetary and near-Earth atmospheric circulations. It also provides an example of a turbulent wave background driving a coherent structure.

AB - We apply the wave-kinetic approach to study nonlinearly coupled Rossby wave-zonal flow fluid turbulence in a two-dimensional rotating fluid. Specifically, we consider for the first time nonlinear excitations of zonal flows by a broad spectrum of Rossby wave turbulence. Short-wavelength Rossby waves are described here as a fluid of quasi-particles, and are referred to as the 'Rossbyons'. It is shown that Reynolds stresses of Rossbyons can generate large-scale zonal flows. The result should be useful in understanding the origin of large-scale planetary and near-Earth atmospheric circulations. It also provides an example of a turbulent wave background driving a coherent structure.

KW - instability

KW - plasma

KW - wave-kinetic

KW - Rossby wave-zonal flow fluid turbulence

KW - nonlinear excitations

KW - zonal flows

KW - Reynolds stresses

KW - turbulent wave background

U2 - 10.1088/1367-2630/11/7/073038

DO - 10.1088/1367-2630/11/7/073038

M3 - Article

VL - 11

JO - New Journal of Physics

T2 - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 073038

ER -