@article{PLOEGER15_JGR,
     author = "F. Ploeger and M. Riese and F. Haenel and P. Konopka and
               R. M{\"u}ller and G. Stiller",
     title  = "Variability of stratospheric mean age of air and of the local
               effects of residual circulation and eddy mixing",
     journal= "J. Geophys. Res. Atmos.",
     volume = "120",
     number = "2",
     pages  = "716-733",
     doi    = "10.1002/2014JD022468",
     year   = "2015"   }