2009

Silver Medal of the European Meteorological Society
Honorary Member of the Royal Meteorological Society, UK
Alfred Wegener Medal and Honorary member of EGU
Doctor Honoris causa, Uppsala University

2008

Member of the Norwegian Polar Academy
Honorary Member of the American Meteorological Society

2007

Rossby Price by the Swedish Geophysical Society

2006

IMO Price WMO

2005 

Descartes price by the EU together with O Johannessen and L Bobylov

1999

Fellow of the American Meteorological Society

1998

Umweltpreis 1998 der Deutschen Bundesstiftung Umwelt -
The German Environmental reward (shared with K Hasselmann and H Grassl)        

Member of the Finnish Academy of Science

1996

Milutin Milancovic medal by the European Geophysical Society

1995

Member of the Nordrhein-Westfälischen Wissenschaftsakademie

1993

Member of the Swedish Academy of Science

1991

Honorary Member of the Swedish Meteorological Society

1990

Doctor Honoris causa, Stockholm University

Förderpreis and the Golden Rosette for European Science by the Körberstiftung, Hamburg

1989

Member of Academia Europea

1986

Julius von Hann's Gold Medal by the Austrian Meteorological Society