Sea surface stress measurements |
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| Authors: | K F Schmitt C A Friehe C H Gibson |
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| Institution: | (1) Department of Applied Mechanics and Engineering Sciences, Scripps Institution of Oceanography University of California, 92093 San Diego La Jolla, California, USA;(2) Present address: Research Aviation Facility, National Centre for Atmospheric Research, 80307 Boulder, Colorado, USA |
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| Abstract: | Sea-surface stress measurements were made from a rigid tower in shallow water near San Diego, California, by both the direct covariance and inertial dissipation techniques. Stress estimates from the dissipation technique were generally higher than the directly measured values, with average drag coefficients of 0.99 x 10-3 and 0.77 x 10-3, respectively, for 8-m wind speeds of 5 to 7 m s-1. In the inertial subrange, ratios of vertical to streamwise velocity spectra averaged 1.06 ± 0.16, significantly less than the isotropic value of 4/3 observed over land, suggesting that turbulence over water may be altered by the presence of waves. |
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