An approximate solution of wave-modified Ekman current for gradually varying eddy viscosity
文献类型：期刊论文
| 作者 | Song, Jin-Bao1,2; Huang, Yan-Song1,2,3 |
| 刊名 | DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
 |
| 出版日期 | 2011-06-01 |
| 卷号 | 58期号:6页码:668-676 |
| 关键词 | Ekman Current Random Wave Stokes Drift Eddy Viscosity Coefficient |
| ISSN号 | 0967-0637 |
| DOI | 10.1016/j.dsr.2011.04.001 |
| 文献子类 | Article |
| 英文摘要 | An approximate steady solution of the wave-modified Ekman current is presented for gradually varying eddy viscosity by using the WKB method with the variation of parameters technique. The parameters involved in the solution can be determined by the two-dimensional wavenumber spectrum of ocean waves, wind speed, the Coriolis parameter and the densities of air and water. The solution reduces to the exact solution when the eddy viscosity is taken as a constant. As illustrative examples, for a fully developed wind-generated sea with different wind speeds and a few proposed gradually varying eddy viscosities, the current profiles calculated from the approximate solutions are compared with those of the exact solutions or numerical ones by using the Donelan and Pierson wavenumber spectrum, the WAM wave model formulation for wind input energy to waves, and wave energy dissipation converted to currents. It is shown that the approximate solution presented has an elegant form and yet would be valid for any given gradually varying eddy viscosity. The applicability of the solution method to the real ocean is discussed following the comparisons with published observational data and with the results from a large eddy simulation of the Ekman layer. (C) 2011 Elsevier Ltd. All rights reserved.; An approximate steady solution of the wave-modified Ekman current is presented for gradually varying eddy viscosity by using the WKB method with the variation of parameters technique. The parameters involved in the solution can be determined by the two-dimensional wavenumber spectrum of ocean waves, wind speed, the Coriolis parameter and the densities of air and water. The solution reduces to the exact solution when the eddy viscosity is taken as a constant. As illustrative examples, for a fully developed wind-generated sea with different wind speeds and a few proposed gradually varying eddy viscosities, the current profiles calculated from the approximate solutions are compared with those of the exact solutions or numerical ones by using the Donelan and Pierson wavenumber spectrum, the WAM wave model formulation for wind input energy to waves, and wave energy dissipation converted to currents. It is shown that the approximate solution presented has an elegant form and yet would be valid for any given gradually varying eddy viscosity. The applicability of the solution method to the real ocean is discussed following the comparisons with published observational data and with the results from a large eddy simulation of the Ekman layer. (C) 2011 Elsevier Ltd. All rights reserved. |
| 学科主题 | Oceanography |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000292372300005 |
| 公开日期 | 2012-07-03 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/11558]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, KLOCAW, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Jin-Bao,Huang, Yan-Song. An approximate solution of wave-modified Ekman current for gradually varying eddy viscosity[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2011,58(6):668-676. |
| APA | Song, Jin-Bao,&Huang, Yan-Song.(2011).An approximate solution of wave-modified Ekman current for gradually varying eddy viscosity.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,58(6),668-676. |
| MLA | Song, Jin-Bao,et al."An approximate solution of wave-modified Ekman current for gradually varying eddy viscosity".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 58.6(2011):668-676. |
入库方式： OAI收割
来源：海洋研究所
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