Read here, here, and here. As C3 readers have discovered, the multiple prediction failures of IPCC climate models are a result of many factors. A recent peer-reviewed study now adds a new one to the ever growing list.
Scientists, using empirical evidence from actual real-world experiments, find that the IPCC climate models' assumption that there is a huge positive feedback from an increase in temperatures, causing more CO2 release from soils and vegetation, causing more temperature increase, ad infinitum, is gigantically wrong. So wrong that it's even becoming obvious to the mainstream press: "
‘Runaway climate change’
‘unrealistic’, say scientists
Several of the critical points from the study:
"1. The climate is quite temperamental: countless factors are involved and many feedback mechanisms enhance effects such as the anthropogenic greenhouse effect. This makes it difficult to make predictions, especially as many processes in the Earth system are still not completely understood.
2. Particularly alarmist scenarios for the feedback between global warming and ecosystem respiration thus prove to be unrealistic.”
3. “It is still not possible to predict whether this attenuates the positive feedback between carbon dioxide concentration and temperature,” says Markus Reichstein. “The study shows very clearly that we do not yet have a good understanding of the global material cycles and their importance for long-term developments.”
4. “We were surprised to find that the primary production in the tropics is not so strongly dependent on the amount of rain,” says Markus Reichstein. “Here, too, we therefore need to critically scrutinize the forecasts of some climate models which predict the Amazon will die as the world gets drier.”"
