This excellent expose comes by way of Powerline Blog:
We have written a number of times about how government agencies, including the National Oceanic and Atmospheric Administration here in the U.S., have systematically adjusted temperature history to make the past look colder. They apparently do this, usually surreptitiously and without explanation, in order to stoke global warming hysteria. See, for example, He Who Controls the Present Controls the Past and Inside the Global Warming Scandal.
Now Mike Brakey, an engineering physicist and heat transfer specialist, has caught NOAA revising historic temperature data for Maine–as always, to make the past look cooler and the present warmer by comparison:
Over the last months I have discovered that between 2013 and 2015 some government bureaucrats have rewritten Maine climate history… (and New England’s and of the U.S.). This statement is not based on my opinion, but on facts drawn from NOAA 2013 climate data vs. NOAA 2015 climate data after they re-wrote it.
We need only compare the data. They cooked their own books…
…For the balance of the years, as they get closer to the present, the NOAA tweaks less and less. They have corrupted Maine climate data between 1895 and present by a whopping accumulated 151.2°F.
David Archibald writes:
Their cooling of the past to keep the global warming meme alive reminds me of the old Soviet joke – the future is known, it is the past that keeps changing.
Would someone please try to explain why this isn’t the biggest scandal in the history of science?