Terrestrial Biosphere Modelling (TBM)
The terrestrial biosphere model QUINCY (QUantifying Interactions between terrestrial Nutrient CYcles and the Climate System) was developed to enable a seamless integration of the fully coupled carbon, nitrogen and phosphorus cycles with each other and also with processes influencing the energy and water balances in terrestrial ecosystems. Its main purpose is to serve as a test bed for process hypotheses to assess their likely effects on terrestrial biogeochemistry and their responses to climate variability and climate change. It was designed as a modular, independent model, a coupling to the land-surface scheme of the am Max-Planck-Institut für Meteorologie developed ICON model is in progress.
The dynamic global vegetation model OCN is a model of the coupled terrestrial carbon and nitrogen cycles (Zaehle und Friend, 2010; Zaehle et al., 2010, GBC), derived from ORCHIDEE-Land surface model (Krinner et al. 2005). It operates on a half-hourly timescale and simulates the daily net carbon exchange and trace nitrogen gas emissions as well as the daily changes in leaf area index, leaf nitrogen and vegetation structure and growth. The main purpose of the model is to analyze the longer-term (interannual to decadal) effects of the nutrient cycle for modeling land-climate interactions (Zaehle et al. 2010, GRL; Zaehle et al. 2011). The model can run offline, controlled by observed meteorological parameters or coupled with the global circulation model LMDz (Marti et al. 2005).
The TBM group uses the high-performance cluster at the Max Planck Institute for Biogeochemistry and supercomputer of the German Climate Computing Center (DKRZ) called blizzard.