New paper finds Southwestern US temperatures 'have been relatively stable over last 500 years'

The Hockey Schtick
"A paper published today in Geophysical Research Letters finds from temperature reconstructions that "Temperature trends in Southwest US have been relatively stable over last 5 centuries" and that there has been "no sustained monotonic rise in temperature or a step-like increase since the late 19th century." This would imply that there has been no significant influence of man-made CO2 on temperatures of the Southwest US."