@article{ECKSTROEM08_ACP,
   author = "M. Ekstr{\"o}m and P. Eriksson and W. G. Read and M. Milz
             and D. P. Murtagh",
   title  = "Comparison of satellite limb-sounding humidity climatologies of
             the uppermost tropical troposphere",
   journal= "Atmos. Chem. Phys.",
   volume = "8",
   pages  = "309-320",
   year   = "2008"   }