Friday, September 27, 2013
IPCC Fifth Assessment Report
The first part on the scientific basis for climate change was released today. The three other parts will be released by mid-2014. I've only had a chance to glance through it so far. As expected, the lack of rising global mean temperatures over the past decade or so seems mostly due prevailing weather patterns (La Nina) and ocean uptake of carbon. The "Summary for Policymakers," here, is easy enough reading for any undergrad. The take-home point is that if the science of climate change met a "clear and convincing" evidence standard in the last assessment report (2007), it meets a tougher "beyond a reasonable doubt" standard in the new report. Note the phrase is "reasonable doubt," so climate deniers will not be deterred.
Posted by Daniel H. Cole at 3:26 PM