On what is there exactly consensus? That the climate is changing? That pumping huge amounts of CO into the atmosphere has an effect on the climate? That is the only thing they can agree on. But even then consensus is meaningless. If there is no "consensus" on the nature of the universe, why do we need consensus in climate science?
The things that they can agree on are the obvious things. The climate is changing, as is obvious if you look at an aggregate of historical weather data. Pumping huge amounts of CO into the atmosphere has an effect on climate, is simple physics a rise from 300ppm to 600ppm has approximately 1.2K rise in temperature. Most skeptics also agree to these basic facts, since anything else would be nonsense.
The things that climate scientists don't agree on are the how feedback mechanisms behave exactly and on how to model them. The IPCC report aggregates multiple models that are widely all over the place. That is why we get predictions all over the place ranging from +6K (catastrophic) to +3K (mild) (300ppm - 600ppm). In addition to the seemingly inability to actually predict the climate. The current slump was totally not predicted, let us hope that the revised models fare better.
When divergent hypotheses (e.g. cosmic rays) are denied publication, because "consensus", then we really have a problem. Divergent hypotheses should be published and discredited based on data and peer review and not clout of the professors favoring the leading theory. The current state of scientific publishing is somewhat broken, where conflict of interest is not money, but possibility of loosing face. That there even was this half bogus* 97% report and that it keeps being parroted over and over tells you almost all you need to know.
* half bogus, because the sample and sample size where very biased. It's like asking if Windows is awesome on the Build conference.