This report presentsan assessment of site specific deposition estimates and critical load
exceedances of sulphur and nitrogen for selected Intensive Monitoring
plots based on input and output estimates and extrapolation to a European
wide scale. Depositions for the individual monitoring plots were calculated
by means of a high-resolution deposition model (IDEM) and the results
were compared to measured depositions for selected Intensive Monitoring
sites. Also for the European Level I sites deposition estimates were
computed. Not only the deposition of sulphur and nitrogen compounds
was determined, but also the deposition of base cations was calculated.
For this an approach was used, mainly based on available measurement
data from the Intensive Monitoring sites. This derived model was also
used to extrapolate to the Level I sites and Intensive Monitoring sites
without deposition measurements.
Critical loads
according to the effect-based and stand-still approach were calculated,
as well as present deposition thresholds for both the Intensive Monitoring
sites and the Level I sites. Using the deposition calculations and critical
loads/present deposition thresholds, exceedances of these target loads
were calculated and presented. The uncertainties involved in these calculations
were evaluated and finally conclusions were drawn on the basis of the
results of the different calculations.