Abstract
For wind-wave interaction studies, from the literature, two criteria for the wind sea are used: one is the wave age and the other wave steepness. Analysis of pertinent datasets from a data buoy near the passage of Hurricane Matthew in 2016 indicates that = -15 + 1.3. Here is the wave age and is the wave steepness, where <em>C</em><sub>p</sub> is the phase speed of the peak wave, <em>U</em><sub>10</sub> is the wind speed at 10 m, <em>H</em><sub>s</sub> is the significant wave height, and <em>L</em><sub>p</sub> is the peak or dominant wave length. It is found that 87% of the variation between wave age and wave steepness can be explained by this relation. Application of this relation to estimate <em>U</em><sub>10</sub> and friction velocity from wave parameters are also presented for practical environmental and engineering use.
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