We thank Dr. J. Piccard and his sponsors for use of the submarine F. A. Forel and for the friendly and constructive help given by the submarine pilots. Financial support for this project is provided by the Swiss National Science Foundation, Grant 2000-066637. Authors S. A. Thorpe and T. R. Osborn are grateful for support by the Ecole Polytechnique Fédérale de Lausanne, which allowed them to take part in this study.
Agrawal, Y. C., E. A. Terray, M. A. Donelan, P. A. Hwang, A. J. Williaws III, W. M. Drennan, K. K. Kahma, and S. A. Kitagorodskii, 1992: Enhanced dissipation of kinetic energy beneath surface waves. Nature, 359 , 219–220.
Graf, W. H., N. Merzi, and C. Perrinjaquet, 1984: Aerodynamic drag: Measured at a nearshore platform on Lake Geneva. Arch. Meteor. Geophys. Bioklimatol., 33A , 151–173.
Keller, K. H., and C. W. van Atta, 2000: An experimental investigation of the vertical temperature structure of homogeneous stratified shear turbulence. J. Fluid Mech., 425 , 1–29.
Large, W. G., and S. Pond, 1981: Open ocean momentum flux measurements in moderate to strong winds. J. Phys. Oceanogr., 11 , 324–336.
Liu, W. T., K. B. Katsaros, and J. A. Businger, 1979: Bulk parameterization of air–sea exchanges of heat and water vapor including the molecular constraints at the interface. J. Atmos. Sci., 36 , 1722–1735.
Merzi, N., and W. H. Graf, 1988: Wind stress over water waves—Field experiment on Lake of Geneva. Meteor. Atmos. Phys., 39 , 14–24.
Oakey, N., 1982: Determination of the rate of dissipation of turbulent energy from simultaneous temperature and velocity shear measurements. J. Phys. Oceanogr., 12 , 256–271.
Osborn, T. R., and W. R. Crawford, 1980: An airfoil probe for measuring turbulent velocity fluctuations in water. Air–Sea Interaction: Instruments and Methods, F. Dobson, L. House, and R. Davis, Eds., Plenum, 369–386.
Stips, J. T., W. Eugster, and A. Wüest, 2003: Observations of a quasi shear-free lacustrine convective boundary layer: Stratification and its implications on turbulence. J. Geophys. Res., 108 .3328, doi:10.1029/2002JC001440.
Thorpe, S. A., and A. J. Hall, 1982: Observations of the thermal structure of Langmuir circulation. J. Fluid Mech., 114 , 237–250.
Thorpe, S. A., and T. R. Osborn, 2005: Skewness of spatial gradients of turbulent dissipation rate in the mixed layer. J. Phys. Oceanogr., 35 , 2299–2303.
Thorpe, S. A., U. Lemmin, C. Perrinjaquet, and I. Fer, 1999: Observations of the thermal structure of a lake using a submarine. Limnol. Oceanogr., 44 , 1575–1582.
Thorpe, S. A., T. R. Osborn, J. F. E. Jackson, R. G. Lueck, and A. J. Hall, 2003: Measurements of turbulence in the upper-ocean mixing layer using Autosub. J. Phys. Oceanogr., 33 , 122–145.
Woods, J. D., 1980: Diurnal and seasonal variation of convection in the wind-mixed layer of the ocean. Quart. J. Roy. Meteor. Soc., 106 , 379–394.