The CO2 model is now the politically correct model. (sciencebits.com)
So much so that if biologists today ask for help in analysing their data, they are likely to get either a statistically correct model with simple behaviour or a dynamically complex model that may shed more insight into the biological problem based on very naïve statistics. (sciencemag.org)
Therefore, I see no justification for using observed values of those aspects to adjust model - predicted warming to correct model biases relating to those aspects, which is in effect what BC17 does. (climateaudit.org)