Environmental Engineering Reference
In-Depth Information
Fig. 1.
Modelled CM contributions to PM10 (μg m
−2
a
−1
) as a result of resuspension by traffic
(top left), by wind (top right), by agriculture (bottom left), and trans-boundary entrainment of
desert dust (bottom right) for 2005
4. Uncertainties
In general, the emission factors used here are based on a very limited knowledge
basis, which is not representative for the full range of European conditions. Hence,
the modelled contributions to mineral PM10 of the different resuspension sources
are a crude approximation of reality and associated with a large uncertainty.
Based upon the applied methods, we presume an overall uncertainty of a factor
2-3 for the modelled traffic resuspension and a factor 10 or more for wind resus-
pension. Largest uncertainties are expected for resuspension by agricultural
activity.
