In an exclusive interview, Dr Bates accused the lead author of the paper, Thomas Karl, who was until last year director of the NOAA section that produces climate data – the National Centers for Environmental Information (NCEI) – of ‘insisting on decisions and scientific choices that maximised warming and minimised documentation… in an effort to discredit the notion of a global warming pause, rushed so that he could time publication to influence national and international deliberations on climate policy’. Dr Bates was one of two Principal Scientists at NCEI, based in Asheville, North Carolina...
The land temperature dataset used by the study was afflicted by devastating bugs in its software that rendered its findings ‘unstable’. The paper relied on a preliminary, ‘alpha’ version of the data which was never approved or verified. A final, approved version has still not been issued.
The paper was published in June 2015 by the journal Science. Entitled ‘Possible artifacts of data biases in the recent global surface warming hiatus’, the document said the widely reported ‘pause’ or ‘slowdown’ was a myth.
Less than two years earlier, a blockbuster report from the UN Intergovernmental Panel on Climate Change (IPCC), which drew on the work of hundreds of scientists around the world, had found ‘a much smaller increasing trend over the past 15 years 1998-2012 than over the past 30 to 60 years’."