Dissipation observations of drag coefficients over the open ocean |
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| Authors: | DeLeonibus P Simpson L |
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| Institution: | National Oceanic and Atmospheric Administration, Washington, DC; |
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| Abstract: | Forty-three open-ocean observations of drag coefficients observed at Argus Island Tower near Bermuda by the dissipation technique resulted in constant drag coefficients for mean horizontal wind velocities between 7.8 and10.4 m .s^{1}in good agreement with the larger near-neutral data set of DeLeonibus and Simpson 1] and the neutral data of Large and Pond 2], both of whom observed10^{3}C_{10} = 1.2whereC_{10}is the drag coefficient at l0 m. Ratios of vertical-to-horizontal wind velocity spectral densities averaged over an inertial subrange of 0.8 to 1.6 Hz ranged from 0.7 to 1.07 in agreement with the Busch and Panofsky 3] result that isotropy is approached only when the observation height is much greater than the Nyquist wavelength. |
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