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Low-order Models of Wave Interactions in the Transition to Baroclinic Chaos : Volume 3, Issue 3 (30/11/-0001)

By Früh, W.-g.

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Book Id: WPLBN0004019860
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: Low-order Models of Wave Interactions in the Transition to Baroclinic Chaos : Volume 3, Issue 3 (30/11/-0001)  
Author: Früh, W.-g.
Volume: Vol. 3, Issue 3
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Früh, W. (-0001). Low-order Models of Wave Interactions in the Transition to Baroclinic Chaos : Volume 3, Issue 3 (30/11/-0001). Retrieved from

Description: Sub-Department of Atmospheric, Oceanic, and Planetary Physics. A hierarchy of low-order models, based on the quasi-geostrophic two-layer model, is used to investigate complex multi-mode flows. The different models were used to study distinct types of nonlinear interactions, namely wave- wave interactions through resonant triads, and zonal flow-wave interactions. The coupling strength of individual triads is estimated using a phase locking probability density function. The flow of primary interest is a strongly modulated amplitude vacillation, whose modulation is coupled to intermittent bursts of weaker wave modes. This flow was found to emerge in a discontinuous bifurcation directly from a steady wave solution. Two mechanism were found to result in this flow, one involving resonant triads, and the other involving zonal flow-wave interactions together with a strong β-effect. The results will be compared with recent laboratory experiments of multi-mode baroclinic waves in a rotating annulus of fluid subjected to a horizontal temperature gradient.

Low-order models of wave interactions in the transition to baroclinic chaos


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