Marleen Carolijn de Ruiter, Vrije Universiteit Amsterdam, Amsterdam, Netherlands, Jens De Bruijn, VU University Amsterdam, Institute for Environmental Studies IVM, Amsterdam, Netherlands, James E Daniell, Karlsruhe Institute of Technology, Geophysical Institute, Karlsruhe, Germany, Johanna Englhardt, Free University of Amsterdam, Amsterdam, Netherlands, Joel Gill, British Geological Survey, Global, Nottinghamshire, United Kingdom, Hans de Moel, Institute for Environmental Studies, Amsterdam, Netherlands and Philip Ward, IVM - VU University Amsterdam, Amsterdam, Netherlands