Nonlinear excitation of zonal flows by rossby wave turbulence
Mendonça, J T and Shukla, P K and Bingham, R (2009) Nonlinear excitation of zonal flows by rossby wave turbulence. New Journal of Physics, 11. 073038. ISSN 1367-2630 (https://doi.org/10.1088/1367-2630/11/7/073038)
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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.
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Item type: Article ID code: 19035 Dates: DateEvent23 July 2009PublishedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Strathprints Administrator Date deposited: 28 May 2010 10:20 Last modified: 02 Aug 2024 11:01 URI: https://strathprints.strath.ac.uk/id/eprint/19035