1987, PhD in Natural Sciences, ETH Zurich. Former research positions with: University College London; McGill University, Montreal; Columbia University; New York; University of Hawaii, Honolulu. Since 1993, Professor of Climate and Environmental Physics, University of Bern; research encompasses the development of climate models of intermediate complexity, modelling past and future climate change, and the reconstruction of the chemical composition of precipitation and greenhouse gas concentrations based on ice cores from Greenland and Antarctica. Over 10 years with UN Intergovernmental Panel on Climate Change (IPCC); 2008, Co-Chair, Working Group I, IPCC. Author or Co-Author of 180 peer-reviewed papers. Fellow, American Geophysical Union (2012). Recipient: Honorary Doctorate, University of Versailles, France (2006); Hans Oeschger Medal, European Geosciences Union (2009).