"Glacier-Gate" and Healthy Skepticism

The last report of the The Intergovernmental Panel on Climate Change (IPCC) contained the claim that there was a probability that the glaciers in the Himalayas would melt by 2035.  It now appears that such a claim never should have been made.  It is instructive to review the bidding to see how this claim appeared in the report.

The claim stated:

Glaciers in the Himalaya are receding faster than in any other part of the world (see Table 10.9) and, if the present rate continues, the likelihood of them disappearing by the year 2035 and perhaps sooner is very high if the Earth keeps warming at the current rate. Its total area will likely shrink from the present 500,000 to 100,000 km² by the year 2035 (WWF, 2005).

First, I provide some background on the IPCC. Second, I discuss the source of this claim, and  third,  I  discuss what this error means. My conclusion is a discussion of healthy skepticism and what it means. Those who claim that the IPCC made an error and therefore climate science is a hoax, are not healthy skeptics of the sort I mean.