The structure of the current version of the AERIS model is modular, following the current trends in IA modelling. Since IAMs should consider all the interacting processes involved, the segmentation of AERIS in modules is advantageous when bringing together expertise from various disciplines (i.e. describing health impacts or monetary evaluations) (Hinkel, 2009). The following sections describe in detail each of the modules comprised by AERIS (Fig. 2).