1. Karlsruhe Institute of Technology, KIT Campus Alpin, Institute of Meteorology and Climate Research- Atmospheric Environmental Research, 82467 Garmisch-Partenkirchen, Germany
2. Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, 76344 Eggenstein-Leopoldshafen, Germany
3. Max Planck Institute for Biogeochemistry, Department of Biogeochemical Processes, 07745 Jena, Germany
4. Ulm University, Institute of Systematic Botany and Ecology, 89081 Ulm, Germany
5. University of Innsbruck, Institute of Botany, 6020 Innsbruck, Austria