Nevertheless, if structural uncertainties in observations and models are fully accounted for, a partial resolution of the long - standing «differential warming» problem has now been achieved. (realclimate.org)
The other structural uncertainty issue is the actual method for combining different biases and the uncertainty model itself. (judithcurry.com)
How do carbon, nitrogen and phosphorus cycles regulate climate system feedbacks, and how sensitive are these feedbacks to model structural uncertainty? (newscenter.lbl.gov)