Surface Albedo Feedback in Eleven CMIP3 Climate Models
Crook, J.A. and Forster, P.M. 2014. Comparison of surface albedo feedback in climate models and observations. Geophysical Research Letters 41: 1717-1723.
In discussing their findings, the two UK researchers report that (1) the "hemisphere extra-tropical feedback is considerably higher for observations (potentially 3.1 ± 1.3 W/m2/K) than for models (0.4-1.2 W/m2/K)," that (2) the "models underestimate the Northern Hemisphere extratropical climate change feedback," and that (3) "in Antarctica the climate change feedback is negative in observations and positive in models."
In light of their several findings, Crook and Foster conclude - in the Conclusions section of their paper - that "understanding reasons for the low Northern Hemisphere extra-tropical climate change feedback for both land and sea in the current generation of climate models should be a priority," which clearly indicates the models are not yet at the point where their output can be given much credence when it comes to surface albedo feedback.