The aim of the WP2 is ultimately to produce a library of simulations for emissions and atmospheric transport. The present report describes and documents the different simulations that will be conducted, the atmospheric transport models employed, and the different emission data sets used as input for the models. Properly documenting and agreeing among the modelling groups on the specific model and simulation setups will allow us to produce a sensible library of simulations that can be used for the inter-comparison of atmospheric transport, to produce realistic synthetic satellite observations, and to investigate the influence of aerosols on the detection of urban plumes and the influence of small scale fluctuations of power plant plumes.