@article{TOOHEY13_JGR,
    author = "M. Toohey and M. I. Hegglin and S. Tegtmeier and J. 
Anderson and
              J. A. A{\~n}el and A. Bourassa and S. Brohede and D. 
Degenstein
              and L. Froidevaux and R. Fuller and B. Funke and J. Gille and
              A. Jones and Y. Kasai and K. Kr{\"u}ger and E. Kyr{\"o}l{\"a}
              and J. L. Neu and A. Rozanov and L. Smith and J. Urban and
              T. von Clarmann and K. A. Walker and R. H. J. Wang",
    title  = "Characterizing sampling biases in the trace gas climatologies
              of the {SPARC D}ata {I}nitiative",
    journal= "J. Geophys. Res. Atmos.",
    volume = "118",
    number = "20",
    doi    = "10.1002/jgrd.50874",
    pages  = "11,847-11,862",
    year   = "2013"   }