I am a professor of Polar Meteorology at Utrecht University. My main research interest at present is to understand the past, present and future climate and mass balance of the large ice sheets of Greenland and Antarctica. I perform my research at the Institute for Marine and Atmospheric Research Utrecht (IMAU) in the Ice and Climate research group. Our group combines experimental fieldwork (in situ meteorological experiments, automatic weather stations and surface mass balance observations) with regional climate models, the latter in close collaboration with the research department of the Royal Netherlands Meteorological Institute (KNMI). Currently, I am scientific director of IMAU