| 摘要: |
| 基于Jenkins(1989)建立的包含Stokes漂流、风输入和波耗散影响的修正Ekman模型，采用Paskyabi等(2012)使用的推广的Donelan和Pierson(1987)谱和波耗散函数，并利用Paskyabi等(2012)中修正方法给出的包含高频波的风输入函数，在粘性不依赖于水深及粘性随深度线性变化的条件下，研究了包含高频毛细重力波的随机表面波对Stokes漂流和Song(2009)导出的波浪修正定常Ekman流解的影响。结果表明高频表面波使Stokes漂流在海表面剪切加强，对定常Ekamn流解的影响通常不能忽略，但对Ekman流场的角度偏转影响很小。对考虑高频表面波尾谱影响所估算的定常Ekman流解与已有观测结果以及经典Ekman解进行了比对分析。 |
| 关键词: 高频波，定常Ekman流解，Stokes漂流，风输入，波耗散 |
| DOI：10.11693/hyhz20121213001 |
| 分类号: |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Effects of high frequency surface waves on the steady Ekman current solutions |
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xujunli and songjinbao
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Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences
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| Abstract: |
| Based on the wave-modified Ekman model including the Stokes drift, wind input and wave dissipation of Jenkins (1989), the effects of high frequency surface waves (including the short waves in the capillary wave range) on the Stokes drift and analytic steady solutions of wave-modified Ekman equation are studied in the present paper. The steady solutions are obtained under the assumptions that eddy viscosity is independent of depth and eddy viscosity increases linearly with depth using the generalized Donelan and Pierson (1987) spectrum, wave dissipation of Paskyabi et al. (2012) and modified wind input which is similar to Paskyabi et al. (2012). The results demonstrate that high frequency surface waves strengthen the shear of the Stokes drift on the sea surface and the effects on the Ekman solutions should not be neglected. But the effect of angular turning on the sea surface is very small. And the wave-modified solutions obtained by including the high frequency waves are compared with the observations and. the classical Ekman solution. |
| Key words: high frequency waves, steady Ekman current solutions, Stokes drift, wind input, wave dissipation |
