memberships
- 2000-2004 Steering Committees of the Comission of Climatology der Internationalen Geographischen Union (IGU)
- 2000-2006 President of the "Association Internationale de Climatologie" (AIC)
- Association of Geographers at German Universities (VGDH)
- Working Commitee of German Latin America Research (ADLAF)
- German Meteorological Society (DMG)
- German Academy of Sciences Leopoldina
- "Prix Vautrin Lud" at the 'Festival International de Géographie', St. Dié-des-Vosges (Frankreich)