Heat and Moisture Fluxes and Related Structure Parameters in the Unstable Atmospheric Surface Layer Over Short Vegetations

摘要

The report presents data of the structure parameters (C sub T) squared, C sub TQ, and (C sub Q) squared for three locations in the Netherlands with different vegetation characteristics. Dimensionless structure parameters are presented as function of the stability parameter z/L and compared with an expression of Wyngaard and Izumi, 1971. It is found that the present data often follow free convection scaling down to lower values of -z/L than predicted by Wyngaard and Izumi. It is recommended that in future experiments of this kind a measurement of the structure parameter of vertical wind velocity is included, from which quantity the energy dissipation can be calculated.