By continuously deploying a turbulence profiler in the upper ocean, we observed the rate of viscous dissipation of turbulent kinetic energy, &egr;, and the rate of diffusive smoothing of turbulent temperature fluctuations, &khgr;, during eleven diurnal cycles of the surface boundary layer (SBL). Even though we restricted our analysis to times when the ocean lost buoyancy at a nearly constant rate, we observed a wide range of conditions, including dominance of the turbulence production by the wind stress. Throughout, &egr; was normalized very well by the sum of the similarity scalings for turbulence produced by wind stress and by convection. Scaling of &khgr; was less successful and applied only when turbulent production was dominated either by wind stress or by convection, and then only within part of the SBL. ¿ American Geophysical Union 1989