Strong correlation between the drag coefficient and the shape of the wind sea spectrum over a broad range of wind speeds

Naohisa Takagaki, Satoru Komori*, Naoya Suzuki, Koji Iwano, Takenori Kuramoto, Satoshi Shimada, Ryoichi Kurose, Keiko Takahashi

*この研究の対応する著者

研究成果: Article査読

61 被引用数 (Scopus)

抄録

Momentum transfer across the wind-driven breaking air-water interface under strong wind conditions was experimentally investigated using a high-speed wind-wave tank together with field measurements at normal wind speeds. An eddy correlation method was utilized to measure roughness length and drag coefficient from wind velocity components measured by laser Doppler and phase Doppler anemometers. As a result, a new model for the roughness length and drag coefficient was proposed for predicting momentum transfer across the sea surface under both normal and strong wind conditions using the universal relationship between energy and significant frequency of wind waves normalized by the roughness length. The model shows that the roughness length and drag coefficient are uniquely determined at all wind speeds by energy and significant frequency of wind waves, and they can be given against U10 only from the measurements of the wave parameters and one-point mean air velocity in the logarithmic law region.

本文言語English
論文番号L23604
ジャーナルGeophysical Research Letters
39
23
DOI
出版ステータスPublished - 2012 12 16
外部発表はい

ASJC Scopus subject areas

  • 地球物理学
  • 地球惑星科学(全般)

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