Out of curiosity I created a graph of annual average temperature anomalies based on HadCRUT3 temperature data but omitting 1943-1971 .
I don’t for a moment believe that the HadCRUT3 data is accurate and reliable, however, I found the graph interesting.
I remind you that IPCC attributed the first half of the rising period to natural causes and the second half to human activity.
I think it looks more like consistent warming out of the Little Ice Age and the omitted period is a time when La Nina conditions dominated. Another hypothesis is that the rise in temperature is due to increasing night-time cloud cover due to industrialisation.
Cheers, John McLean
Click on graph image for larger view.