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Climategate, the sequel: How we are STILL being tricked with flawed data on global warming
Something very odd has been going on with the temperature data relied on by the world's scientists, writes Christopher Booker
Although it has been emerging for seven years or more, one of the most extraordinary scandals of our time has never hit the headlines. Yet another little example of it lately caught my eye when, in the wake of those excited claims that 2014 was “the hottest year on record”, I saw the headline on a climate blog: “Massive tampering with temperatures in South America”. The evidence on Notalotofpeopleknowthat, uncovered by Paul Homewood, was indeed striking.
Puzzled by those “2014 hottest ever” claims, which were led by the most quoted of all the five official global temperature records – Nasa’s Goddard Institute for Space Studies (Giss) – Homewood examined a place in the world where Giss was showing temperatures to have risen faster than almost anywhere else: a large chunk of South America stretching from Brazil to Paraguay.
Noting that weather stations there were thin on the ground, he decided to focus on three rural stations covering a huge area of Paraguay. Giss showed it as having recorded, between 1950 and 2014, a particularly steep temperature rise of more than 1.5C: twice the accepted global increase for the whole of the 20th century.
But when Homewood was then able to check Giss’s figures against the original data from which they were derived, he found that they had been altered. Far from the new graph showing any rise, it showed temperatures in fact having declined over those 65 years by a full degree. When he did the same for the other two stations, he found the same. In each case, the original data showed not a rise but a decline.
Homewood had in fact uncovered yet another example of the thousands of pieces of evidence coming to light in recent years that show that something very odd has been going on with the temperature data relied on by the world's scientists. And in particular by the UN’s Intergovernmental Panel on Climate Change (IPCC), which has driven the greatest and most costly scare in history: the belief that the world is in the grip of an unprecedented warming.
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An early glaring instance of this was spotted by Steve McIntyre, the statistician who exposed the computer trickery behind that famous “hockey stick” graph, beloved by the IPCC, which purported to show that, contrary to previous evidence, 1998 had been the hottest year for 1,000 years. It was McIntyre who, in 2007, uncovered the wholesale retrospective adjustments made to US surface records between 1920 and 1999 compiled by Giss (then run by the outspoken climate activist James Hansen). These reversed an overall cooling trend into an 80-year upward trend. Even Hansen had previously accepted that the “dust bowl” 1930s was the hottest US decade of the entire 20th century.
Assiduous researchers have since unearthed countless similar examples across the world, from the US and Russia to Australia and New Zealand. In Australia, an 80-year cooling of 1 degree per century was turned into a warming trend of 2.3 degrees. In New Zealand, there was a major academic row when “unadjusted” data showing no trend between 1850 and 1998 was shown to have been “adjusted” to give a warming trend of 0.9 degrees per century. This falsified new version was naturally cited in an IPCC report (see “New Zealand NIWA temperature train wreck” on the Watts Up With That science blog, WUWT, which has played a leading role in exposing such fiddling of the figures).
By far the most comprehensive account of this wholesale corruption of proper science is a paper written for the Science and Public Policy Institute, “Surface Temperature Records: Policy-Driven Deception?”, by two veteran US meteorologists, Joseph D’Aleo and WUWT’s Anthony Watts (and if warmists are tempted to comment below this article online, it would be welcome if they could address their criticisms to the evidence, rather than just resorting to personal attacks on the scientists who, after actually examining the evidence, have come to a view different from their own).
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