Hugh Pickens DOT Com writes: Chris Mooney writes at Mother Jones that a new study, from the Yale and George Mason University research teams on climate change communication, shows a 7-percentage-point increase in the proportion of Americans who say they do not believe that global warming is happening. And that's just since the spring of 2013. The number of deniers is now 23 percent; back at the start of last year, it was 16 percent (PDF). The obvious question is, what happened over the last year to produce more climate denial? The answer may lie in the so-called global warming "pause"—the misleading idea that global warming has slowed down or stopped over the the past 15 years or so. This claim was used by climate skeptics, to great effect, in their quest to undermine the release of the UN Intergovernmental Panel on Climate Change's Fifth Assessment Report in September 2013—precisely during the time period that is in question in the latest study. "The notion of a global warming "pause" is, at best, the result of statistical cherry-picking," writes Mooney. " It relies on starting with a very hot year (1998) and then examining a relatively short time period (say, 15 years), to suggest that global warming has slowed down or stopped during this particular stretch of time." Put these numbers back into a broader context and the overall warming trend remains clear. "If you shift just 2 years earlier, so use 1996-2010 instead of 1998-2012, the trend is 0.14 C per decade, so slightly greater than the long-term trend," explains Drew Shindell, a climate scientist at NASA who was heavily involved in producing the IPCC report. This is why climate scientists generally don't seize on 15 year periods and make a big thing about them. "Journalists take heed: Your coverage has consequences. All those media outlets who trumpeted the global warming "pause" may now be partly responsible for a documented decrease in Americans' scientific understanding."