1. ProClim, Swiss Academy of Sciences, Bern, Switzerland
2. A.M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russia
3. Institute of Geophysics and Meteorology, University of Cologne, Cologne, Germany
4. Norwegian Meteorological Institute, Oslo, Norway
5. Institute of Meteorology, University of Hamburg, Hamburg, Germany
6. Department of Meteorology, Stockholm University, Stockholm, Sweden
7. Di.S.Te.B.A., University of Salento, Lecce, Italy
8. Department of Meteorology, University of Reading, Reading, United Kingdom
9. Climate Research Division, Environment Canada, Toronto, Ontario, Canada
10. Institute of Meteorology, Freie Universität Berlin, Berlin, Germany
11. P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, and Moscow State University, Moscow, Russia
12. European Centre for Medium-Range Weather Forecasts, Reading, and Met Office, Exeter, United Kingdom
13. Graduate School of Science, Hokkaido University, Sapporo, Japan
14. School of Earth Sciences, University of Melbourne, and Bureau of Meteorology, Melbourne, Victoria, Australia
15. Royal Netherlands Meteorological Institute, De Bilt, Netherlands
16. Bjerknes Centre for Climate Research, Bergen, Norway
17. School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
18. Instituto Dom Luiz, University of Lisbon, Lisbon, and School of Sciences and Technology, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
19. Di.S.Te.B.A., University of Salento, and CMCC, EuroMediterranea Center on Climate Change, Lecce, Italy
20. Climate and Environmental Physics, and Oeschger Center for Climate Change Research, University of Bern, Bern, Switzerland
21. P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia, and School of Earth Sciences, University of Melbourne, Melbourne, Victoria, Australia
22. School of Earth Sciences, University of Melbourne, Melbourne, Victoria, Australia
23. Embry-Riddle Aeronautical University, Prescott, Arizona
24. Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
25. Instituto Dom Luiz, University of Lisbon, and Institute of Meteorology I. P., Lisbon, Portugal