Hi Gavin — In response to your reply to comment # 10, the issue is the vertical distribution of positive temperature trends that is used as a measure of radiative forcing. (realclimate.org)
You may remember from the «Red and Blue States» thread on CA that Tucson had the greatest positive temperature trend for any USHCN station after TOBS adjustment. (climateaudit.org)
The distinct patterns in the NAM versus the PCT suggest that the basin - wide positive temperature trends observed in the period of AA are more similar to, and thus more closely related to, PCT + than with the NAM — . (nature.com)