海面粗糙度方案的适用性研究
Application studies on sea surface roughness parameterization schemes
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摘要: 由量纲分析导出海面粗糙度与波龄及海面涌浪的状况有关,并对与波龄和波陡有关的两种海面粗糙度模型方案进行了敏感性测试,得出利用波龄模型方案计算粗糙度的误差比利用波陡模型方案小。基于国际上6个不同水深、风区和海况条件的海气交换试验资料,将其分为两组,一组是纯风海或以风海为主海况条件,另一组是以涌浪为主海况条件,测试波龄、波陡模型海面粗糙度方案在不同试验条件下的适用性。结果得出:在各种海况条件下,波龄模型粗糙度方案比波陡模型具有更好的普适性。在纯风海或以风海为主海况条件下,PS07,DGHQ03方案计算的粗糙度长度与实测资料计算结果最接近,GW06方案次之,O02方案计算结果明显偏高;涌浪为主海况条件下两种模型方案计算的粗糙度长度均偏低,O02方案计算的粗糙度长度误差相对较小,TY01方案误差最大。Abstract: Sea surface roughness derived from dimensional analysis bears a relation to wave age and swell. The paper explored two scalings parameterization schemes' sensitivity to wave age and wave steepness, concluded that the errors estimated from wave age scaling are lower from wave steepness scaling. Based on data of the six air-sea interaction experiments under different water depth, fetch and sea state conditions, we distinguished between two classes of sea state: pure wind sea or wind sea-dominant and swell-dominant,tested the suitability of the wave age and wave steepness scalings schemes under different experiments. It be found that wave age scaling have higher suitability than wave steepness scaling under variedly sea state conditions. For pure wind sea or wind sea-dominant cases, the calculated results based on PS07 and DGHQ03 are close to those given by the eddy correlation method, GW06 scheme secondly, O02 calculations are overestimated markedly. For swell-dominated sea cases the calculated results based on the two sea-state scalings are all underestimated. The errors of sea roughness based on O02 scheme is the least, the TY01 scheme lead to the maximum errors.
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Key words:
- sea surface roughness /
- wave age /
- wave steepness /
- scaling
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