My current research interests include: ¥ Improving crop water use efficiency and productivity by increasing the rate of diffusion of CO2 within leaves ¥ Scaling leaf-level exchange processes to the canopy ¥ Linking carbon and water cycling within ecosystems using stable isotopes of CO2 and water ¥ Development of process-based models to interpret the stable isotope record in tree rings ¥ Development of laser-based measurement systems for real-time measurement of plant, soil and ecosystem isofluxes My research involves developing and applying new theory and measurement techniques to address issues related to biosphere-atmosphere exchange across a range of scales. I work in controlled-environment growth facilities, managed ecosystems (including cereal crops, pasture and plantation forests), and natural ecosystems such as old-growth forests