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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 |
| Date: | 22 September 2009 |
| 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: | |
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| URI: | http://wrap.warwick.ac.uk/id/eprint/2335 |
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