CHUNDER DOWN UNDER
HOW GHCN v3.2 MANUFACTURES WARMING IN THE OUTBACK
by Roger Andrews
I originally entitled this post “Blunder Down Under”, but then it occurred to me that all of what I’m about to describe wasn’t a blunder at all, but intentional. So I changed “Blunder” to “Chunder”, which as those of you familiar with the Strine language will know, means “throw up”.
NCDC recently released the latest version of the Global Historic Climate Network data set – GHCN version 3.2, which applies adjustments to remove the artificial man-made discontinuities and spurious gradients that allegedly plague the “raw” GHCN Version 2 data.
I started to go through the GHCN v3.2 data, and the first record I looked at was Alice Springs in the middle of Australia. I plotted the “raw” GHCN v2 data against the adjusted GHCN v3.2 data for the station, and here’s what I got:
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