Bernd Kulessa is Professor of Geophysics and Glaciology at Swansea University, Wales, UK. His research focuses on the use of applied geophysics to contribute to our understanding of the response of the world’s ice masses to past, present, and future climatic change, and to address related scientific problems of anthropogenic impact. Peter G. Knight (Series Editor) is Reader in Geography at Keele University, Staffordshire, England, UK. His work examines how glaciers entrain debris into their basal layers and how that basal ice affects glacier behavior and glacial landforms.