Energy Distribution of Waves above 1 Hz on Long Wind Waves
Abstract. A new technique is developed to study the spatial distribution of wind-generated ripples on long wind waves in the ocean. For that purpose the deformation of ripple spectra by currents originating from the long waves has to be removed. The data taken during the Jonswap 75 Experiment indicate that the distribution of short surface waves (ripples) on long waves has a maximum in the trough of the long waves, so far as the contribution coherent with the long waves is concerned. If the raw time series are considered, the maximum shifts to the forward front of the long waves due to the effect of orbital motion of the long waves.
KeywordsModulation Transfer Function Orbital Motion Orbital Velocity Intrinsic Frequency Coherence Spectrum
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