English Abstract An automated system for measuring the dry deposition
fluxes of SO2 on a routine basis based on the micrometeorological gradient
technique has been developed. The ability of the system to determine
turbulent exchange parameters such as the friction velocity u* and the heat
flux H was investigated by comparison with an automated eddy correlation
system. Determination of u* and H by both methods have generally been found
to be in very good agreement for 20 minute averages. Aerodynamic
resistances derived from both systems showed no systematic differences but
individual values differed considerably. From the analysis it appeared that
apart from classical rejection criteria on wind speed and inhomogeneity etc.
also measuring cycles with large shift in wind direction have to be removed
from the dataset before interpretation.