不同海况下六种湍流通量参数化方案的对比分析-海洋预报

不同海况下六种湍流通量参数化方案的对比分析

单位：1. 解放军理工大学气象学院, 南京, 211101;
2. 中国气象科学研究院, 北京, 100081;
3. 总参气象水文中心, 北京, 100081

分类号：P731

出版年·卷·期（页码）：2007·2007·第二期（9-16）

摘要：

利用前人给出的表面波浪动力试验中的部分观测资料,通过六种不同的湍流通量参数化方案,分别计算了不同海面波浪状况所对应的摩擦速度。结果表明:海面状况对计算结果有显著影响,六种参数化方案计算的摩擦速度相对涡动相关法(EC)直接测量值的偏差纯风浪海面状况下,较交叉涌浪或反向涌浪海面状况时小得多。并且在纯风浪海面状况下,当近海层大气处于不稳定层结时,Dyer74方案计算的摩擦速度相对EC直接测量值的归一化误差最小,仅为8.47%,能够较好的估计近海层摩擦速度。在稳定层结条件下,当整体Richardson数小于0.1时,除Businger71方案外,其它五种方案的计算误差接近且较小。

The fraction velocities in different wind-sea/swell regimes are calculated by using six different turbulent flux parameterization schemes,where the dada collected from the surface wave dynamics experiment are used.The results show that,compared with the fraction velocities directly measured by eddy-covariance method in different wind-sea/swell regimes,all parameterization schemes estimate friction velocity in pure wind sea regime better than those in both crossing swell and counter swell regimes.Furthermore,under pure wind sea regimes,when the atmosphere near the sea surface is unstable,the normalized error of Dyers’ scheme on friction velocity is the least,only of 8.47%.Under stable conditions,beside the scheme of Businger,the normalized error of the other five schemes are closely and less.

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