The current generation of global atmospheric models in use for climate studies around the world do some things remarkably well, as I've tried to argue in several earlier posts. (gfdl.noaa.gov)
The choice of the beginning and end point of climate studies determines the overall trend. (cfact.org)
This is really bad news because it seems to suggest that our data of the 19th century has not got enough precision to be used in climate studies. (theinconvenientskeptic.com)