Validation of dispersion models using Cabauw field experiments and numerical weather re-analysis Online publication date: Tue, 16-Apr-2019
by Gertie Geertsema; Marko Kaasik
International Journal of Environment and Pollution (IJEP), Vol. 64, No. 1/2/3, 2018
Abstract: The Gaussian atmospheric dispersion model AEROPOL is validated against the classical Cabauw dispersion experiment, driven by (1) on-site meteorological data and (2) meteorological data from the numerical weather model HARMONIE. The meteorological forecast time used at the time of the release is 10 to 14 hours ahead of the analysis time. The results from the combination of AEROPOL with on-site data are slightly better than with re-analysed meteorology. The near-surface concentrations based on the combination of AEROPOL with the model forecasts are in general lower than the concentrations from the combination of AEROPOL with on-site data and are also lower than the observed concentrations. The combination of AEROPOL with meteorological model results in a mismatch between the modelled position of the plume axis with the observed plume axis. The results show a significant improvement in the HARMONIE version 38 with respect to the HARMONIE version 37.
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