supported by the neutral and stable conditions which often occurwithNWwind; only at shorter distances, the unstable classes 2 and3 are relevant which are mainly observed with easterly winds. Asunstable situations are very seldom in the Klug-Manier scheme,LASAT calculates either no or similar separation distancescompared to AODM for an exceeding probability of 8% west of theodour source.Another reason for larger separation distances with LASATcompared to AODM are probably due to the different modelphysics: whereas AODM, a Gauss model, produces a stationaryconcentration field for a half-hour time step, LASAT calculatesconcentrations as long as the trajectories stay within the model