UPDATED: Do the Adjustments to Land Surface Temperature Data Increase the Reported Global Warming Rate?

Watts Up With That?

Guest Post by Bob Tisdale

This is an update of the post published a week ago here (WattsUpWithThat cross post is here). That earlier post included “raw” unadjusted data based on an outdated version of the NOAA GHCN dataset. This updated post includes annual land surface air temperature data through 2015 and uses the current version of the “raw” GHCN data…supplied by Zeke Hausfather. Thank you, Zeke.  Most of the text is the same.  I’ve updated the discussions of the trends and the source of the “raw” data.

I’ve also added a curiosity at the end.

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Quick Answer to the Title Question:  Over the long term, the answer is yes, the adjustments to land surface temperature data increase the reported global warming rate, and the differences between datasets are noticeable. Over shorter terms, the answer depends on the dataset.


This is the second in a…

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