Katy Burrows, Durham University, Durham, NULL, United Kingdom, David Milledge, Newcastle University, School of Engineering, Tyne and Wear, United Kingdom, Dino G. Bellugi, University of California Berkeley, Geography, Berkeley, CA, United States, Richard J Walters, Durham University, COMET, Department of Earth Sciences, Durham, United Kingdom and Alexander Densmore, Durham University, Geography, Durham, United Kingdom