In USHCN V1, the TOBS adjustment was less than 0.4F, and goes flat after 1990.
In V2, they use the same algorithm
This net effect is about the same as that of the TOB adjustments in the HCN version 1 temperature data (Hansen et al. 2001), which is to be expected since the same TOB-adjustment method is used in both versions.
But now, the TOBS adjustment is more than 0.3C, and doesn’t go flat after 1990.
So the same algorithm now produces very different results, favoring global warming – as with all the other data tampering. Zeke says he doesn’t know what caused the discrepancy.
Good enough for government work.