综合利用6个国际海洋观测试验资料,共同验证Charnock参数与无因次粗糙度长度(z0/Hs)对波龄的依赖性,建立粗糙度回归模型,并对其进行显著性和适用性检验,从而导出粗糙度无因子形式与有效波高有关.利用研制的粗糙度方案(SP07)研究充分发展风浪与风区、风时和水深的关系,及粗糙度长度对摩擦速度和波龄的敏感度.把SP07方案引入国际上最先进的计算海气通量的COARE(V3.0)算法中,选择1985年12月在北海的FPN平台上的试验资料,进一步检验SP07方案的适用性.得出目前国际上最先进的O02和TY01方案较高估计了摩擦速度,YT96方案略偏低估计了摩擦速度,文中研制的方案计算结果与实测结果最接近.
We investigate dependence of Charnock parameters and nondimensional roughness length (zo/Ha) on wave age. A roughness scheme is developed which reflects sea state. Effects of wind fetch, duration and water depth on sea roughness are studied. Sensitivity of roughness to friction velocity and wave age is discussed. The scheme is applied to the latest COARE algorithm. With data of FPN platform in North Sea in December 1985, applicability of the new scheme is tested. It is shown that TY01 and 002 schemes overestimate u. and Y396 scheme underestimates it. Results of the new scheme are the closest to observed data.