The Danish emergency response model of the atmosphere (DERMA)

The three-dimensional atmospheric dispersion model DERMA is of Lagrangian type making use of a hybrid stochastic particle-puff diffusion description. It is currently capable of describing plumes at downwind distances greater than about 20 km and up to the global scale. The model employs aerosol-size dependent dry and wet deposition parameterisations. DERMA is developed and used mainly for nuclear emergency preparedness purposes, and it has recently become integrated with the ARGOS nuclear decision-support system.