Raw model sea ice concentration data was processed using a simple linear regression model and satellite derived ice extent to produce bias corrected predictions. (arcus.org)
Regarding the missing raw model output data, I realise this is an important concern and am frustrated by the loss and not being able to check directly into the issues raised by Mr. Lewis. (judithcurry.com)
Brown and Caldeira's study eliminates the lower end of this range, finding that the most likely warming is about 0.9 degrees Fahrenheit (0.5 degrees Celsius) greater than what the raw model results suggest. (phys.org)