Photographic Documentation of Poor Sitings - Part III From Our JGR Paper

Here.

Excerpt:

The message from these analyses is that the use of the surface temperature record from such observation sites to construct regional-, zonal- and global- averages introduces a bias (which is expected to be a significant warm bias) of an unknown magnitude. That this issue has not been questioned in the climate assessments nor by most of the media reports of the assessments is a scandal.