| WANG Juanjuan,SONG Jinbao,HUANG Yansong,FAN Conghui. 2013. On the parameterization of drag coefficient over sea surface. Acta Oceanologica Sinica, 32(5):68－74 |
| On the parameterization of drag coefficient over sea surface |
| On the parameterization of drag coefficient over sea surface |
| Received:March 20, 2012 Revised:September 05, 2012 |
| DOI：10.1007/s13131-013-0315-3 |
| Key words:drag coefficient parameterization wave steepness wind-sea Reynolds number |
| 中文关键词: drag coefficient parameterization wave steepness wind-sea Reynolds number |
| 基金项目:The National Basic Research Program of China under contract Nos 2011CB403501 and 2012CB417402; the Fund for Creative Research Groups by the National Natural Science Foundation of China under contract No. 41121064. |
| Author Name | Affiliation | E-mail | | WANG Juanjuan | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | SONG Jinbao | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | songjb@qdio.ac.cn | | HUANG Yansong | South China Sea Marine Engineering Surveying Center, South China Sea Branch, State Oceanic Administration, Guangzhou 510300, China | | | FAN Conghui | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | |
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| Abstract: |
| Six parameterization schemes of roughness or drag coefficient are evaluated on the basis of the data from six experiments. They present great consistency with measurement when friction velocity u*<0.5 m/s (approximately corresponding to 10 m wind speed U10<12 m/s) and large deviation from measurement when u*≥0.5 m/s (approximately U10≥12 m/s). In order to improve the deviation, a new parameterization of drag coefficient is derived on the basis of the similarity theory, Charnock relationship and Toba 3/2 power law. Wave steepness and wind-sea Reynolds number are considered in the new parameterization. Then it is tested on the basis of the measurements and shows significant improvement when u* ≥0.5 m/s. Its standard errors are much smaller than the ones of the other six parameterizations. However, the new parameterization still needs more tests especially for high winds. |
| 中文摘要: |
| Six parameterization schemes of roughness or drag coefficient are evaluated on the basis of the data from six experiments. They present great consistency with measurement when friction velocity u*<0.5 m/s (approximately corresponding to 10 m wind speed U10<12 m/s) and large deviation from measurement when u*≥0.5 m/s (approximately U10≥12 m/s). In order to improve the deviation, a new parameterization of drag coefficient is derived on the basis of the similarity theory, Charnock relationship and Toba 3/2 power law. Wave steepness and wind-sea Reynolds number are considered in the new parameterization. Then it is tested on the basis of the measurements and shows significant improvement when u* ≥0.5 m/s. Its standard errors are much smaller than the ones of the other six parameterizations. However, the new parameterization still needs more tests especially for high winds. |
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