1. Institute of Agricultural Sciences; ETH Zurich; Zurich Switzerland
2. Empa; Swiss Federal Laboratories forMaterials Scienceand Technology; Dübendorf Switzerland
3. Climate Services; Federal Office of Meteorology and Climatology (MeteoSwiss); Krähbühlstrasse 58 Zurich Switzerland
4. MetAir AG, Airborne Observations; Airfield LSZN; Hausen am Albis Switzerland
5. Max Planck Institute for Biogeochemistry; Jena Germany
6. Agroscope Reckenholz-Tänikon Research Station ART; Zurich Switzerland
7. Meteotest; Bern Switzerland