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Triple cascade behaviour in QG and drift turbulence and generation of zonal jets

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Nazarenko, Sergey and Quinn, Brenda E.. (2009) Triple cascade behaviour in QG and drift turbulence and generation of zonal jets. Physical Review Letters, Vol.10 (No.11). p. 8501. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.103.118501

Abstract

We study quasigeostrophic (QG) and plasma drift turbulence within the Charney-Hasegawa-Mima (CHM) model. We focus on the zonostrophy, an extra invariant in the CHM model, and on its role in the formation of zonal jets. We use a generalized Fjørtoft argument for the energy, enstrophy, and zonostrophy and show that they cascade anisotropically into nonintersecting sectors in k space with the energy cascading towards large zonal scales. Using direct numerical simulations of the CHM equation, we show that zonostrophy is well conserved, and the three invariants cascade as predicted by the Fjørtoft argument.

Item Type:

Journal Article

Subjects:

Q Science > QA Mathematics
Q Science > QC Physics

Divisions:

Faculty of Science > Mathematics

Library of Congress Subject Headings (LCSH):

Plasma turbulence, Turbulence -- Research, Geostrophic currents, Plasma jets, Fluid dynamics

Journal or Publication Title:

Physical Review Letters

Publisher:

American Physical Society

ISSN:

0031-9007

Official Date:

22 September 2009

Dates:

Date	Event
22 September 2009	Published

Volume:

Vol.10

Number:

No.11

Page Range:

p. 8501

Identification Number:

10.1103/PhysRevLett.103.118501

Status:

Peer Reviewed

Access rights to Published version:

Restricted or Subscription Access

Version or Related Resource:

Nazarenko, N. and Quinn, B. E. (2010). Triple cascade behaviour in QG and drift turbulence and generation of zonal jets. IUTAM Symposium on Turbulence in the Atmosphere and Oceans, 28, pp. 265-288

Related URLs:

Related item in WRAP

References:

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