On the Balance Between Growth and Dissipation in an Extreme Depth-Limited Wind-Sea in the Southern North Sea

E. Bouws Royal Netherlands Meteorological Institute, De Bilt, The Netherlands

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G. J. Komen Royal Netherlands Meteorological Institute, De Bilt, The Netherlands

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Abstract

Bouwa has given a discussion of a severe storm in the southern North Sea, on 3 January 1976 near Texel, one of the Friesian islands. This storm was characterized by a remarkable steadiness of wind and wave parameters. The steadiness of the wave parameters was apparently the result of depth limitations, which prevented further wave evolution. Here the various terms in the energy balance equation for wave growth in shallow water are estimated. The relative importance of wind input, surface dissipation, bottom dissipation, advection and nonlinear transfer is discussed. For a certain choice of dissipation parameters, a good balance can be obtained. This is in agreement with the steadiness of the observed wave conditions.

Abstract

Bouwa has given a discussion of a severe storm in the southern North Sea, on 3 January 1976 near Texel, one of the Friesian islands. This storm was characterized by a remarkable steadiness of wind and wave parameters. The steadiness of the wave parameters was apparently the result of depth limitations, which prevented further wave evolution. Here the various terms in the energy balance equation for wave growth in shallow water are estimated. The relative importance of wind input, surface dissipation, bottom dissipation, advection and nonlinear transfer is discussed. For a certain choice of dissipation parameters, a good balance can be obtained. This is in agreement with the steadiness of the observed wave conditions.

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