Addendum to 'Effects of sea roughness and atmospheric stability on wind wave growth'

摘要

Myrhaug and Slaattelid (2002) (hereafter referred to as MS) considered the effects of sea surface roughness and atmospheric stability on the wind wave growth using the logarithmic boundary layer profile including a stability function, combined with some commonly used sea surface roughness formulations. 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 behaviour. MS used the Toba et al. (1990) formula where the roughness increases as the wave age increases, and the Smith et al. (1992) formula where the roughness decreases as the wave age increases (see Table 2, MS). The wave age independent Charnock (1955) formula was used as a reference. Since then an expression for the sea surface roughness has been provided by Volkov (2001). The purpose of this note is to use the Volkov (2001) roughness formula and to present similar results as in MS. Volkov concludes that simple power law formulas like that proposed by e.g. Toba et al. and Smith et al. for the dependency of roughness with wave age are not adequate.