1. NILU ‐ Norwegian Institute for Air Research Kjeller Norway
2. Bjerknes Centre for Climate ResearchUniversity of Bergen Norway
3. Max‐Planck‐Institute for Meteorology Hamburg Germany
4. Leibniz Institute for Atmospheric PhysicsUniversity of Rostock Germany
5. Meteorological InstituteUniversity of Hamburg Germany
6. KNMI—Royal Netherlands Meteorological Institute De Bilt Netherlands