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Large eddy simulation of turbulence in ocean surface boundary layer at Zhangzi Island offshore |
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| Authors: | LI Shuang SONG Jinbao HE Hailun HUANG Yansong |
| Affiliation: | 1326. Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China 2326. Ocean College, Zhejiang University, Hangzhou, 310058, China 3326. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, China 4326. College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing, 210098, China 5326. South China Sea Marine Engineering Surveying Center, South China Sea Branch, State Oceanic Administration, Guangzhou, 510300, China |
| Abstract: | This study uses a large eddy simulation (LES) model to investigate the turbulence processes in the ocean surface boundary layer at Zhangzi Island offshore. Field measurements at Zhangzi Island (39°N, 122°E) during July 2009 are used to drive the LES model. The LES results capture a clear diurnal cycle in the oceanic turbulence boundary layer. The process of the heat penetration and heat distribution characteristics are analyzed through the heat flux results from the LES and their differences between two diurnal cycles are discussed as well. Energy balance and other dynamics are investigated which show that the tide-induced shear production is the main source of the turbulence energy that balanced dissipation. Momentum flux near the surface shows better agreement with atmospheric data computed by the eddy correlation method than those computed by bulk formula. |
| Keywords: | ocean surface boundary layer large eddy simulation turbulence momentumflux heat flux |
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