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Avalanches, breathers, and flow reversal in a continuous Lorenz-96 model

Blender, R., Wouters, J. and Lucarini, V. (2013) Avalanches, breathers, and flow reversal in a continuous Lorenz-96 model. Physical Review E, 88 (1). 013201. ISSN 1550-2376

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To link to this item DOI: 10.1103/PhysRevE.88.013201

Abstract/Summary

For the discrete model suggested by Lorenz in 1996, a one-dimensional long-wave approximation with nonlinear excitation and diffusion is derived. The model is energy conserving but non-Hamiltonian. In a low-order truncation, weak external forcing of the zonal mean flow induces avalanchelike breather solutions which cause reversal of the mean flow by a wave-mean flow interaction. The mechanism is an outburst-recharge process similar to avalanches in a sandpile model.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
ID Code:71508
Publisher:American Physical Society

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