LI Jiangnan, YANG Chaofeng, LI Fangzhou, HE Qihua, LI Weibiao. A comparison of summer precipitation structures over the South China Sea and the East China Sea based on tropical rainfall measurementmission[J]. Acta Oceanologica Sinica, 2013, 32(11): 41-49. doi: 10.1007/s13131-013-0376-3
Citation: WANG Juanjuan, SONG Jinbao, HUANG Yansong, FAN Conghui. On the parameterization of drag coefficient over sea surface[J]. Acta Oceanologica Sinica, 2013, 32(5): 68-74. doi: 10.1007/s13131-013-0315-3

On the parameterization of drag coefficient over sea surface

doi: 10.1007/s13131-013-0315-3
  • Received Date: 2012-03-20
  • Rev Recd Date: 2012-09-05
  • 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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