Ralf Greve is a professor for glacier and ice sheet research at Hokkaido University's Institute of Low Temperature Science in Sapporo, Japan (since 2004). He is a physicist by training, earned his doctor degree in 1995 at Darmstadt University of Technology, Germany, with a theoretical, analytical, and numerical study on the dynamics and thermodynamics of polythermal ice sheets, and has continued with related research since then. Until 2003 he worked as a research associate (wissenschaftlicher Mitarbeiter), assistant professor (wissenschaftlicher Assistent) and lecturer (Privatdozent) at the Department of Mechanics, Darmstadt University of Technology. Ralf Greve is the author/coauthor of more than 75 peer-reviewed scientific papers and two textbooks on ice dynamics and continuum mechanics. Further, he serves as Scientific Editor for the Journal of Glaciology and maintains the open-source ice sheet model SICOPOLIS.