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originally posted by: Kali74
a reply to: ElectricUniverse
No they don't. You are looking at one set that was adjusted up and using it to claim that all of them are and that simply is not the case.
...If this drop of more than a degree had been due to a station move, or other non-climatic factors, you would expect to see a step change in the monthly figures at some point during the year.
Yet, as the chart below shows, this is not the case. Monthly temperatures for 1971, expressed as anomalies from 1951-70, are all over the place. With so much variation from month to month, is it possible to isolate a station move from the background of natural variability, even if there had been one?