| Simulation of the ocean surface mixed layer under the wave breaking |
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| 作者姓名： | SUN Qun SONG Jinbao GUAN Changlong |
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| 作者单位： | [1]InstituteofOceanology,ChineseAcademyofSciences,Qingdao266071,China／／LaboratoryofPhysicalOceanography,OceanUniversityofChina,Qingdao266003,China [2]InstituteofOceanology,ChineseAcademyofSciences,Qingdao266071,China [3]LaboratoryofPhysicalOceanography,OceanUniversityofChina,Qingdao266003,China |
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| 基金项目： | supported by the cooperative project of the Chinese Academy of Sciences and the China National Offshore Oil Corporation，国家自然科学基金 |
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| 摘 要： | A one-dimensional mixed-layer model, including a Mellor-Yamada level 2.5 turbulence closure scheme, was implemented to investigate the dynamical and thermal structures of the ocean surface mixed layer in the northern South China Sea. The turbulent kinetic energy released through wave breaking was incorporated into the model as a source of energy at the ocean surface, and the influence of the breaking waves on the mixed layer was studied. The numerical simulations show that the simulated SST is overestimated in summer without the breaking waves. However, the cooler SST is simulated when the effect of the breaking waves is considered, the corresponding discrepancy with the observed data decreases up to 20% and the MLD calculated averagely deepens 3.8 m. Owing to the wave-enhanced turbulence mixing in the summertime, the stratification at the bottom of the mixed layer was modified and the temperature gradient spread throughout the whole thermocline compared with the concentrated distribution without wave breaking.
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| 关 键 词： | 断裂波 混合层 摄动核能量 温度突变层 海洋仿真 |
| 收稿时间： | 2004/10/8 0:00:00 |
| 修稿时间： | 2/3/2005 12:00:00 AM |
Simulation of the ocean surface mixed layer under the wave breaking |
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| SUN Qun,SONG Jinbao,GUAN Changlong.Simulation of the ocean surface mixed layer under the wave breaking[J].Acta Oceanologica Sinica,2005,24(3):9-15. |
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| Authors: | SUN Qun SONG Jinbao and GUAN Changlong |
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| Institution: | 1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Laboratory of Physical Oceanography, Ocean University of China, Qingdao 266003, China2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China3.Laboratory of Physical Oceanography, Ocean University of China, Qingdao 266003, China |
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| Abstract: | A one-dimensional mixed-layer model, including a Mellor- Yamada level 2.5 turbulence closure scheme, was implemented to investi- gate the dynamical and thermal structures of the ocean surface mixed layer in the northern South China Sea. The turbulent kinetic ener- gy released through wave breaking was incorporated into the model as a source of energy at the ocean surface, and the influence of the breaking waves on the mixed layer was studied. The numerical simulations show that the simulated SST is overestimated in summer without the breaking waves. However, the cooler SST is simulated when the effect of the breaking waves is considered, the corre- sponding discrepancy with the observed data decreases up to 20% and the MLD calculated averagely deepens 3.8 m. Owing to the wave-enhanced turbulence mixing in the summertime, the stratification at the bottom of the mixed layer was modified and the tempera- ture gradient spread throughout the whole thermocline compared with the concentrated distribution without wave breaking. |
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| Keywords: | breaking waves mixed layer turbulent kinetic energy thermocline |
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