Abstract
A robust method for determining the ABL height is studied and verified against radiosonde observations. The method which is based on a bulk Richardson number approach, is suited for use in dispersion models based on output from numerical weather prediction (NWP) models with limited vertical resolution in the boundary layer. Based on NWP data from the DMI-HIRLAM model, the method was utilised for real-time dispersion modelling during the European Tracer Experiment (ETEX) by the Danish Emergency Response Model of the Atmosphere (DERMA). In a preliminary model evaluation, DERMA performed very well.
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