San Francisco Chronicle:
On Friday, Brown called climate change “the greatest problem mankind has ever faced,” and hoped that California “can be the catalyst that shifts national policy and international policy.”
Nature: Overestimated global warming over the past 20 years
San Francisco Chronicle:
On Friday, Brown called climate change “the greatest problem mankind has ever faced,” and hoped that California “can be the catalyst that shifts national policy and international policy.”
Nature: Overestimated global warming over the past 20 years
Recent observed global warming is significantly less than that simulated by climate models. This difference might be explained by some combination of errors in external forcing, model response and internal climate variability.
WSJ Dr. Matt Ridley
Later this month, a long-awaited event that last happened in 2007 will recur. Like a returning comet, it will be taken to portend ominous happenings. I refer to the Intergovernmental Panel on Climate Change’s (IPCC) “fifth assessment report,” part of which will be published on Sept. 27.
There have already been leaks from this 31-page document, which summarizes 1,914 pages of scientific discussion, but thanks to a senior climate scientist, I have had a glimpse of the key prediction at the heart of the document. The big news is that, for the first time since these reports started coming out in 1990, the new one dials back the alarm. It states that the temperature rise we can expect as a result of man-made emissions of carbon dioxide is lower than the IPPC thought in 2007. [Emphasis added]
Will Governor Brown change his mind when AR-5 declares that climate change is no long a major threat to man-kind? California used IPCC assessment reports as the main justification for AB-32. What happens when AR-5 pulls the rug out from under AB-32?