I’ve been posting on USHCN and the effect of “estimating” or “Infilling” on the Final data. I did Arizona earlier.
I repeat … this is the Final data after all the other adjustments. About 15% of the data is Estimated from neighboring stations.
I will post all the monthly graphs … but just discuss the first – January.
The data is 1980 to 2014. So it has the 1980-1990 warming trend in it.
The trend of REAL data is 0.23C/decade. That’s the 35,854 values referenced in the legend.
Then they add in about 15% Estimated data with a trend of +0.66C/decade. That’s the 4516 values.
The net result is a new trend of +0.33C/decade.
Presto. Magic. A .23C trend is now a .33C trend. (Click on graphs for larger).