Abstract

AbstractWe study experiments on baroclinic instabilities in a different heated rotating annulus cooled from within. Characteristic time series of the flow velocity are measured with the Laser–Doppler–Velocimetry (LDV) technique. The surface flow is observed with a co–rotating camera. Steady waves as well as complex flow states are observed. Hysteresis is also found. The drift rate of stable baroclinic waves is determined. The methods of non–linear time series analysis are used to investigate the dynamics of baroclinic waves, particulary in transition zones between different flow regimes. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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