Recent GIS based national assessments of climate change consequences in France: methods, results and lessons learnt.

ABSTRACT Le Cozannet, G., Ait-Kaci, H., Colas, S., De Lacaze, X., Lecacheux, S., Mirgon, C., Peinturier, C., Garcin, M., and Oliveros, C., 2013. Recent GIS based national assessments of climate change consequences in France: methods, results and lessons learnt This paper reviews two recent assessments undertaken in France for evaluating national scale consequences of global change for coastal hazards and risks, namely marine submersion and coastal erosion. In a first approach, the potential consequences of climate change were evaluated in a direct quantitative way, however with high uncertainties in the final evaluation. Recognizing that uncertainties could hardly be reduced, a second assessment based on a multi-criteria evaluation was then undertaken. Geomorphological and marine factors that account for physical vulnerability to coastal hazards were evaluated for 21 coastal entities in metropolitan France. The evaluation was structured using the analytical hierarchy process (AHP). The results highlighted...