Source: Not A Lot of People Know That
By Paul Homewood
I showed yesterday how, by the magic of GHCN adjustments, the temperature record for De Bilt, in the Netherlands, had changed from a cycle, with little overall trend, to a steady, consistent warming.
Hans Erren had originally spotted this a few years ago, leading to a Steve McIntyre post in 2007. Hans had discovered that there had been a minor station move in 1950, which had triggered the adjustments of as much as 1C.
The detail of the move, which involved a switch from a wooden pagoda to a Stevenson screen, was detailed by KNMI here.
As both Hans and Steve commented, it is difficult to see how such a minor move could possibly make so much difference the temperature, (and if it really did, such large adjustments would carry such a large margin of error as to make the end results meaningless).
However, there is an easy way to check this out, by comparing this particular period with nearby stations.