Investigation of the energy budget component in the atmospheric boundary layer above a pine forest in the upper Rhine valley (Hartheim)

The gathering of micrometeorological data at a control point in the Hartheim pine forest, and the subsequent data analysis, are described. A difference measuring method and a profile measuring technique are compared. Heat and water balance were determined (Aug. 1974 to Jul. 1975). Heat flux at the ground and for the pine canopy were evaluated. Wind profile parameters were also investigated based on wind velocity measurements. Results show that the indirectly determined evapotranspiration rate above the young pine forest correlates well with measured radiation intensity and that the latent heat flux corresponds to 62.8% of radiant energy.