Nick is concerned that I show a US cooling trend since 1920, when other sources show warming. He thinks there might be something wrong with my GHCN/USHCN software.
The graph below has two trends on it. Both were created with my software. The only difference in how they were generated is that one uses the raw USHCN data set, and the other uses the final USHCN data set. The discrepancy is due to the USHCN V2 adjustments.
The next graph shows my calculated GHCN HCN daily trend in blue, on top of Hansen 1999 in red. The discrepancy is much smaller, and is due to the USHCN V1 adjustments.
There is nothing wrong with my software. NOAA/NASA are tampering with the data. As for Best/Muller/Mosher, the quotes below pretty much sum it up.
By Richard Muller on December 17, 2003
Let me be clear. My own reading of the literature and study of paleoclimate suggests strongly that carbon dioxide from burning of fossil fuels will prove to be the greatest pollutant of human history. It is likely to have severe and detrimental effects on global climate. I would love to believe that the results of Mann et al. are correct, and that the last few years have been the warmest in a millennium.
“It is ironic if some people treat me as a traitor, since I was never a skeptic“
Why anyone in the skeptic community trusted Muller – is beyond my comprehension.