Subglacial roughness of the Greenland Ice Sheet: relationship with contemporary ice dynamics and geology.

Michael Cooper1, Thomas Jordan2, Chris Williams2, Martin J Siegert3 and Jonathan L Bamber2, (1)University of Bristol, School of Geographical Sciences, Bristol, BS8, United Kingdom, (2)University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, (3)Imperial College London, London, United Kingdom