By Paul Homewood
The CET is always based on anomalies from a 1961-90 baseline. This goes against normal WMO procedures, which say the latest 30 yr period should be used, ie 1981-2010.
We can speculate why!
But Neil Catto coincidentally prepared this graph for me earlier, which shows the difference if 1981-2010 had been used.
Put simply. the 1981-2010 period averaged 0.49C warmer than 1961-90. So when the Met Office says that 2016 was 0.83C warmer than average, they really mean that it was 0.34C warmer than 1981-2010.
The current 30-year average is 10.14C. Against that, last year was only 0.2C warmer.