Another hockey stick. Coincident with the hockey stick of USHCN temperature adjustments, is a hockey stick of data fabrication. More than 40% of USHCN final station data is now generated from stations which have no thermometer data.
The graph below is generated by counting the number of reported monthly temperatures in the final and raw data sets. The have lost 30% of their station data since 1990, but still report adjusted temperatures for the missing data.