Since different GCMs provide different projections of future climate depending on both the GCMs themselves and the Green House Gas (GHG) emission scenario chosen, there is a broad range of future climate scenarios projected by these GCMs. Significant uncertainty therefore exists when attempting to select a reasonable number of future climate scenarios, due to time and resource constraints, to be considered in climate change impacts assessment. To robustly plan for adaptation for a region it is therefore essential not only to define which future climate change scenarios should be considered but also to assess the uncertainty associated with these scenarios and address the uncertainty appropriately in decision making.