The IPCC WG1 Chapter 3 Report clearly cherrypicked information on the robustness of the land near-surface air temperature to bolster their advocacy of a particular perspective on the role of humans within the climate system. As a result, policymakers and the public have been given a false (or at best an incomplete) assessment of the multi-decadal global average near-surface air temperature trends.
"Documentation of IPCC WG1 Bias by Roger A. Pielke Sr. and Dallas Staley - Part I," Climate Science: Roger Pielke Sr. Research Group Weblog (2007-06-20)