Consensus on consensus: a synthesis of consensus estimates on human-caused global warming - IOPscience

http://iopscience.iop.org/article/10.1088/1748-9326/11/4/048002#erlaa1c48s4

From a broader perspective, it doesn't matter if the consensus number is 90% or 100%. The level of scientific agreement on AGW is overwhelmingly high because the supporting evidence is overwhelmingly strong.

---Steve