Comparison of Ocean Surface Wind Stress Computed with Different Parameterization Functions of the Drag Coefficient
Comparison of Ocean Surface Wind Stress Computed with Different Parameterization Functions of the Drag Coefficient
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DOI：
10.1007/s10872-005-0022-6
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发表时间：
2005-02
影响因子：
2.3
通讯作者：
P. Hwang
中科院分区：
文献类型：
--
作者：
P. Hwang
根据参考风速的选择，阻力系数的定量和定性特性可能会有所不同。在海洋表面，表面波是海气界面的物理粗糙度，对控制海气交换过程起着重要作用。表面波的动态影响程度与波长成比例。用与波长成正比的仰角（例如Uλ/2）处的参考风速计算的阻力系数与用固定10m高程处的风速（U10）计算的阻力系数有本质上的不同。使用阻力系数的几种不同参数化函数进行了比较，以量化风应力计算的差异。结果表明，使用参考 Uλ/2 的阻力系数根据 U10 输入计算的风应力比参考 U10 的阻力系数函数计算的风应力更准确。
Depending on the choice of reference wind speed, the quantitative and qualitative properties of the drag coefficient may vary. On the ocean surface, surface waves are the physical roughness at the air-sea interface, and they play an important role in controlling the air-sea exchange processes. The degree of dynamic influence of surface waves scales with wavelength. Drag coefficient computed with the reference wind speed at an elevation proportional to the wavelength (for example,Uλ/2) is fundamentally different from the drag coefficient computed with the wind speed at fixed 10 m elevation (U10). A comparison has been carried out to quantify the difference in wind stress computation using several different parameterization functions of the drag coefficient. The result indicates that the wind stress computed fromU10input using a drag coefficient referenced toUλ/2is more accurate than that computed with drag coefficient functions referenced toU10.