Peter Lilley & Graham Stringer Vote Against Climate Committee’s IPCC Report
The Global Warming Policy Foundation (GWPF)http://www.thegwpf.org/peter-lilley-graham-stringer-vote-against-climate-committees-ipcc-report/
” …They added: “As scientists by training, we do not dispute the science of the greenhouse effect – nor did any of our witnesses. However, there remain great uncertainties about how much warming a given increase in greenhouse gases will cause, how much damage any temperature increase will cause and the best balance between adaptation to versus prevention of global warming.
The bulk of the main IPCC technical report recognises these uncertainties and is simply a useful compilation of the research in the field.
However, the Summary for Policy Makers is far less balanced than the report it purports to summarise.
Its headline conclusion was that “evidence for human influence has grown since AR4. It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century”. It is hard to justify that increase in confidence that CO2 emissions are dominant given that: about one third of all the CO2 omitted by mankind since the industrial revolution has been put into the atmosphere since 1997; yet there has been no statistically significant increase in the mean global temperature since then. By definition, a period with record emissions but no warming cannot provide evidence that emissions are the dominant cause of warming!
The pause in surface warming does not invalidate the greenhouse effect. But it does mean that other factors – natural variations – can be of the same magnitude as the greenhouse effect over at least a decade and a half. Since such variations are presumed to cancel out over the long term variations in the opposite direction may have contributed a significant portion of the surface warming over the previous two and a half decades…. “