You can’t make this stuff up. There is yet another USHCN cheat going on with the raw data – which I just discovered.
The graph above plots USHCN 2.0 daily minus GHCN HCN daily data. They are supposed to be identical raw data sets, but USHCN 2.0 is doing something to cool the past and warm the present. This occurs before the USHCN 2.5 raw data cheat which I reported earlier today.
These people are corrupting the trend upwards at every step of the process.