It is extremely likely that the most oft-cited statement from the “Summary for Policymakers” (SPM) of the forthcoming Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC) will be: It is extremely likely that human influence on climate caused more than half of the increase in global average surface temperature from 1951–2010. Mainstream media and global warming enthusiasts will latch onto that. With little or no awareness of either its textual or its historical … [Read more...]