Thomas Stocker was born in Zürich, Switzerland, and obtained a PhD in Natural Sciences at ETH Zürich in 1987. He has held research positions at University College London, McGill University (Montreal), Columbia University (New York) and the University of Hawai'i (Honolulu). Since 1993 he has been Professor of Climate and Environmental Physics at the University of Bern. His 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. Thomas Stocker has published over 160 peer-reviewed papers in the area of climate dynamics and paleoclimate modeling and reconstruction. He was awarded a Dr Honoris Causa of the University of Versailles (France) in 2006 and the Hans Oeschger Medal of the European Geosciences Union in 2009. Thomas Stocker served as a Coordinating Lead Author in the Third and Fourth Assessment Reports of the IPCC and was elected Co-Chair of Working Group I for the IPCC's Fifth Assessment Report in 2008.