2015-09-17. Global warming ‘pause’ never happened, scientists say.

posted Sep 27, 2015, 8:17 AM by Alan Gould
By Chelsea Harvey, Washington Post. For GSS Climate Change chapter 7. Excerpt: The climate science sphere has been wrapped up in a major debate for the past several years: over the global warming “pause.” But now, a growing body of research has some scientists saying that the case may, in fact, be closed. They’re arguing that the pause never existed. The notion of a global warming pause, or “climate hiatus,” suggests that the rising of global surface temperatures has significantly slowed or even stopped during the past 15 years.  ...two new studies, released within days of each other, are adding to the evidence that the pause may not exist. ...a statistical analysis of global temperature data and concludes that “there have been 6 occasions since 1970 when a 15-year trend would have failed to reach significance.” The authors argue that each of these cases, including the most recent 15-year stretch, constitutes a mere fluctuation in a much larger overall warming trend, and that none of these fluctuations statistically alters the trend. ...a separate experiment that lead author Stephan Lewandowsky, a cognitive psychologist at the University of Bristol, says is “the most exciting part.”...subjected the idea of a warming pause to something called a blind expert test. They presented the climate data to a group of 25 professional economists, but told them that the data represented world agricultural output, not temperature. They did this to prevent any personal biases the economists might have, essentially “dressing up the data as something different that doesn’t have any political or emotional connotations,” Lewandowsky says. They then asked the economists whether a pause in output had occurred in the period after 1998. The experts rejected this idea, and some even agreed that such a statement was “fraudulent.”....  http://www.washingtonpost.com/news/energy-environment/wp/2015/09/17/new-statistical-studies-dismantle-the-notion-of-a-global-warming-pause/?postshare=231442584982024