Environmental scientists are challenged to understand the effects of a range of environmental perturbations to the Earth system from global phenomena like climatic or atmospheric change to land use transformations. Ecologists can also observe, collect, record and store more data, more frequently and more extensively than ever before. One approach to address these problems and opportunities is to fuse observations with mathematical models to infer responses to environmental change. The seminar will introduce some of the projects I've been working on in the last few years. In particular I'll talk about how we can use observations of carbon pools and fluxes to constrain ecosystem models over different spatial and temporal scales to answer questions about the impact of bark beetle induced mortality on carbon cycling.