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Impacts of wave and current on drag coefficient and wind stress over the tropical and northern Pacific |
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| Authors: | Zengan Deng Dongliang Zhao Kejian Wu Ting Yu Jian Shi |
| Institution: | 1. Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, P. R. China;Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh 27695,North Carolina, U.S. 2. Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, P. R. China 3. Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, P R. China |
| Abstract: | By taking into consideration the effects of ocean surface wave-induced Stokes drift velocity U,w and current velocityU,c on the drag coefficient,the spatial distributions of drag coefficient and wind stress in 2004 are computed over the tropical andnorthern Pacific using an empirical drag coefficient parameterization formula based on wave steepness and wind speed.The globalocean current field is generated from the Hybrid Coordinate Ocean Model (HYCOM) and the wave data are generated from Wave-watch Ⅲ (WW3).The spatial variability of the drag coefficient and wind stress is analyzed.Preliminary results indicate that theocean surface Stokes drift velocity and current velocity exert an important influence on the wind stress.The results also show thatconsideration of the effects of the ocean surface Stokes drift velocity and current velocity on the wind stress can significantly im-prove the modeling of ocean circulation and air-sea interaction processes. |
| Keywords: | ocean surface Stokes drift velocity ocean surface current velocity wind stress drag coefficient HYCOM WW3 |
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