Air-sea thermodynamic fluxes in high winds and a signature of spray effects
The first task listed above is done by analyzing over 2000 dropsonde datasets to create mean vertical profiles of thermodynamic quantities, and relating these mean profiles to surface fluxes using Monin-Obukhov similarity theory. Several approximations must be made in this process but estimates of the enthalpy bulk flux coefficient are similar to those obtained using other techniques. For the second task, we observe the effects of spray by computing the power-law scaling coefficient of the total enthalpy flux as a function of 10-meter wind speed. In agreement with model predictions, a stronger dependence of enthalpy flux with wind speed is found in measurements taken from within tropical cyclones than in cases where spray would not be expected to play a large role. The limitations and implications of these findings will be discussed.