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Journal of Oceanography

, Volume 61, Issue 1, pp 91–107 | Cite as

Comparison of Ocean Surface Wind Stress Computed with Different Parameterization Functions of the Drag Coefficient

  • Paul A. Hwang
Article

Abstract

Depending on the choice of reference wind speed, the quantitative and qualitative properties of the drag coefficient may vary. On the ocean surface, surface waves are the physical roughness at the air-sea interface, and they play an important role in controlling the air-sea exchange processes. The degree of dynamic influence of surface waves scales with wavelength. Drag coefficient computed with the reference wind speed at an elevation proportional to the wavelength (for example, Uλ/2) is fundamentally different from the drag coefficient computed with the wind speed at fixed 10 m elevation (U10). A comparison has been carried out to quantify the difference in wind stress computation using several different parameterization functions of the drag coefficient. The result indicates that the wind stress computed from U10 input using a drag coefficient referenced to Uλ/2 is more accurate than that computed with drag coefficient functions referenced to U10.

Keywords

Drag coefficient wind stress parameterization functions wavelength wave age dimensionless frequency 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Paul A. Hwang
    • 1
  1. 1.Oceanography Division, Naval Research LaboratoryStennis Space CenterU.S.A.

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