Report on models, model needs and requirements. Contribution to task 5.

This report gives an overview of models, model processes, and the needs and requirements concerning models to be applied in the project “Amines, emissions to air”. The atmospheric cycle of amines, i.e. emissions, transport, chemistry and loss, is revealed and discussed. The question of scale is given special attention. Based on the wide range of scales involved, NILU suggests three different types of models or model concepts: box models, small scale local models, and regional large scale models. For every model concept, existing models are described. No model has amine chemistry at the moment. To include amines in existing models will be first priority. For each of the three model types, NILU recommends possible models to use. Concerning regional large scale models, the WRF-Chem, CMAQ-MM5, or FLEXPART models are recommended, with amine chemistry included.