Read here, here, here, here, here, here, here, and here. The 2007 IPCC report makes entirely bogus claims about a major portion the Amazon shortly turning to a savanna condition due to lack of precipitation, caused by human induced CO2-warming. As was discovered earlier this year, this "scientific" claim was found to be nothing more than a green organization's scare propaganda, without peer-reviewed science backing. Recently, a climate alarmist scientist attempted to assert that the bogus claim was indeed peer-reviewed. Turns out, like almost all climate alarmsists, he conveniently misrepresents the facts.
"1. The IPCC made a claim that “Up to 40% of the Amazonian forests could react drastically to even a slight reduction in precipitation”, and that the South American climate could change rapidly to a new steady state.
2. This was referenced to a WWF review paper which was not peer reviewed.
3. The WWF paper had no citation for that claim.
4. Dr. Lewis says the claims are correct. However, like the IPCC, he does not provide a citation for his claim that the 40% statement is correct. He points us to a 2009 paper, of which he is a co-author. It doesn’t contain any support for the 40% claim. He refers to a few climate models, but shows no evidence.
5. Dr. Lewis says that there is “much uncertainty” about the question.
6. Dr. Lewis does not provide any evidence to support the idea that the South American climate is likely to change rapidly to a new steady state.
However, all of this, all of the claims and counterclaims, and the models, and Dr. Lewis’s letter, and the cited scientific documents, all run aground on one ugly fact: The data shows no change in Amazon rainfall in a century of measurements."