By Paul Homewood
https://www.metoffice.gov.uk/hadobs/hadcet/graphs/HadCET_graph_ylybars_uptodate.gif
I have frequently referred to the step change in CET during the late 1980s and 90s.
While looking for something else, I came across this temperature record for Switzerland, which could almost be its twin.
NationalClimateObservingSystem_GCOSSwitzerland-Small.pdf
Which brings us back to the question – what caused this sudden jump in temperatures?
Climate Collections 