Issue Section:Technical Brief
Keywords:wind, ocean waves, mechanical engineering
Topics:Seas, Stress, Surface roughness, Waves, Wind
Contributed by the OOAE Division for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received September 2002; final revision, October 2002. Associate Editor: A Naess.
Myrhaug and Slaattelid 1 (hereafter referred to as MS) considered the effects of sea roughness and atmospheric stability on the sea surface wind stress over waves, which are in local equilibrium with the wind, by using the logarithmic boundary layer profile including a stability function, as well as adopting some commonly used sea surface roughness formulations. The engineering relevance of the results was also discussed. Since no consistent sea surface roughness formulations existed in the literature at that time, MS chose to demonstrate how the results varied by using two roughness formulas having significantly different behavior. MS used the Toba et al. 2 formula where the roughness increases as the wave age increases, and the Donelan et al. 3 formula where...