Erweiterung der `Localized Near Field' Theorie zur Bestimmung von Quellstärken bei beliebiger thermischer Schichtung in einem Waldbestand

The energy and mass budget of the atmosphere is mainly determined
by the exchange at the earths surface. Here plant canopies play a
major role. The 'Localized Near Field Theorie' (LNF) of Raupach
(1989) describes the relation between concentration profiles and
source/sink profiles inside the plant canopy. This work describes a
general method based on the LNF to calculate source distributions
from measured concentration profiles inside a plant canopy. The LNF
is used for the first time to examine the effects of the so called
roughness sublayer. To apply the LNF during arbitrary thermal
stratification it is necessary to find parametrisations for the
input parameters standard deviation of vertical velocity and
Lagrangian integral time scale. These are derived from values
measured inside a pine forest. Using these parametrisations the
distribution of heat sources inside the forest canopy is calculated
from measured temperature profiles.