claim: The report, published in the journal Nature Geoscience on September 18, acknowledges that most of the models of warming trends failed to predict the ‘slowdown’ in warming post-2000, resulting in less pronounced warming than predicted and thus more room in the CO2 ‘emissions budget’ for the coming decades.
evidence: A month before formal AR5 publication, a leaked draft of the report noted that Models do not generally reproduce the observed reduction in surface warming trend over the last 10–15 years, but lacked clear explanations, and attracted wide media coverage.