Schmitgen, S. [P:(DE-Juel1)VDB1438] ; Geiss, H. [P:(DE-Juel1)16201] ; Neininger, B. [P:(DE-HGF)0] ; Ciais, P. [P:(DE-HGF)0] ; Baeumle, M. [P:(DE-HGF)0] ; Fuchs, W. [P:(DE-HGF)0] ; Brunet, Y. [P:(DE-HGF)0] ; Kley, D. [P:(DE-Juel1)16204]