Observations: Atmosphere and surface

Dennis L. Hartmann, Albert M.G. Klein Tank, Matilde Rusticucci, Lisa V. Alexander, Stefan Brönnimann, Yassine Abdul Rahman Charabi, Frank J. Dentener, Edward J. Dlugokencky, David R. Easterling, Alexey Kaplan, Brian J. Soden, Peter W. Thorne, Martin Wild, Panmao Zhai