Leads the Open Oceans research group at the British Antarctic Survey, which is focused on understanding the role of the polar oceans in the global climate system. She is a climate scientist who has worked at Ecole Normal Superieure in Paris and at MIT, as well as at the University of Cambridge. Her personal research concerns atmosphere and ocean dynamics. She is currently focusing her efforts on understanding the circulation of the Southern Ocean around Antarctica and of the Arctic Ocean and their influences on global climate. She taken part in a number of observational campaigns in the Arctic and Antarctic and is at present leading an assessment of the representation of southern hemisphere atmosphere and ocean processes in the climate models to be included in the next IPCC report. At the University of Cambridge she is a faculty member of the Climate Leadership Programme and teaches on a range of courses offered by the Cambridge Programme for Sustainability Leadership. At present she is undertaking a part-time secondment as a scientific advisor to the UK Government's Department of Energy and Climate Change.