English Abstract An operational model is described which is intended for
the calculation of long term average air concentrations and depositions for
a range of substances and on various spatial scales. Next to a short
description of the model principles, this report contains also a
specification of the model and an explanation to the required input
parameters. A comparison of model predictions with observations is given,
leading to an estimation of uncertainties in model results. Finally, three
application examples have been worked out.
