1. Max Planck Institute for Biogeochemistry, Jena, and International Max Planck Research School for Earth Ecosystem Modeling, Hamburg, Germany
2. Max Planck Institute for Biogeochemistry, Jena, Germany
3. Max Planck Institute for Biogeochemistry, Jena, and Max Planck Institute for Meteorology, Hamburg, Germany
4. Max Planck Institute for Meteorology, and Meteorological Institute, University of Hamburg, Hamburg, Germany