The AGU’s Fall Meeting in San Francisco is the largest Earth and Space Science meeting in the world. Together with Michael Dietze, Andrew M. Fox and Hank W. Loescher, AnaEE coordinator Abad Chabbi will coordinate a session on “Forecasting a complex: Advances and opportunities in merging observations, experiments, and models”. The roundtable will consider how ecosystems and the services they provide are likely to change in the future and our decisions might affect this trajectory. This session aims to highlight developments and identify opportunities for cutting-edge forecasting research in biogeochemistry, bio-geophysics and ecology across both terrestrial and aquatic systems.