Evaporation derived from optical and radio-wave scintillation

Abstract

The determination of the evaporation from scintillation measurements at several wavelengths is discussed. The refractive-index structure parameter Cn2 derived from the observed amplitude scintillation on a 30-GHz radio link is compared to a spot measurement of this quantity at a much lower height than that of the radio link. After free convection height scaling, a difference of a factor of 3 is found. This factor is discussed. A calculation of the evaporation from the observed radio-wave scintillation yields good agreement with calculations based on the Priestley-Taylor formula.