Silvia Caldararu¹, Tea Thum¹, Dushan Kumarathunge², Belinda Medlyn³ and Sönke Zaehle¹, (1)Max Planck Institute for Biogeochemistry, Jena, Germany, (2)Western Sydney University, Hawkesbury Institute for the Environment, Penrith, NSW, Australia, (3)Western Sydney University, Hawkesbury Institute for the Environment, Sydney, Australia