Shaun Quegan is a professor at the School of Mathematics and Statistics at the University of Sheffield and a member of the UK National Centre for Earth Observation and the Leverhulme Centre for Climate Change Mitigation. His research over the last 25 years has been mainly concerned with using satellite and ground data with ecosystem models to clarify the role of the land surface, especially forests, in the Earth’s carbon cycle and climate. Much of his work in the last decade, including that in CLINF, has been concerned with Arctic processes involved in the carbon and water cycles. He is the proposer and lead scientist of the European Space Agency BIOMASS mission, launching in 2023, which will measure forest biomass, height, and disturbance worldwide, and he has served on numerous national and international committees advising on climate and Earth observations by satellites.