Professor Pierre Friedlingstein is an Officer of the WCRP Joint Scientific Committee. Pierre is a Fellow of the Royal Society, he holds a Chair in Mathematical Modelling of the Climate System at the University of Exeter and is also Research Director at the Centre National de la Recherche Scientifique, France. His research interests are in the field of global biogeochemical cycles and their role in the climate system. He is leading research on carbon cycle feedbacks and developed a mathematical framework for climate-carbon feedbacks analysis. He is also involved in the development and evaluation of land surface models (JULES) and their inclusion in Earth System Models. Pierre was lead author for the IPCC AR4 and AR5.