A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).



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Hadley excuse implies their quality control might filter out the freak outliers? Not so.

The Met Office, Hadley Centre response to #DataGate implied they do quality control and that leaves the impression that they might filter out the frozen tropical islands and other freak data:

We perform automated quality checks on the ocean data and monthly updates to the land data are subjected to a computer assisted manual quality control process.

I asked John to expand on what Hadley means. He replies that the quality control they do is very minimal, obviously inadequate, and these errors definitely survive the process and get into the HadCRUT4 dataset. Bear in mind a lot of the problems begin with the national meteorological services which supply the shoddy data, but then Hadley seems pretty happy to accept these mistakes. (Hey, it’s not like Life on Earth depends on us understanding our climate. :- ) )

As far as long term trends go, the site-move-adjustments are the real problem and create an artificial warming trend. On the other hand, the frozen tropical islands tells us how competent the “Experts” really are (not a lot) and how much they care about understanding what our climate really was (not at all). That said, we don’t know what effect the [...]