The Blackboard

Evidently, the APS (American Physical Society) is inviting papers to debate a very specific conclusion of the IPCC:
There is a considerable presence within the scientific community of people who do not agree with the IPCC conclusion that anthropogenic CO2 emissions are very probably likely to be primarily responsible for the global warming that has [...]

Sometimes, a picture is worth a thousand words.
See the blue vertical line at 2 C/century? That’s the central tendency for trends projected by the IPCC in the AR4.
See the bell-shaped curve? That’s a spread of trends due to “weather noise” that we might expect if the “weather noise” is similar to that [...]