Stohl, A. [P:(DE-HGF)0] ; James, P. [P:(DE-HGF)0] ; Forster, C. [P:(DE-HGF)0] ; Spichtinger, H. W. [P:(DE-HGF)0] ; Marenco, A. [P:(DE-HGF)0] ; Thouret, V. [P:(DE-HGF)0] ; Smit, H. G. J. [P:(DE-Juel1)16203]