Ransom makes much of "the most accurate map ever (!) of how vegetation could change in the region.”
Yet he never points out that the actual paper makes no such claim. The Daily Mail added that hyperbole. In fact, the researchers are very cautious in their statements and more reputable secondary sources (http://www.sciencedaily.com/releases/2013/03/130331165603.htm?) reflect that caution:
"By incorporating observed relationships between plants and albedo, we show that vegetation distribution shifts will result in an overall positive feedback to climate that is likely to cause greater warming than has previously been predicted,"
Not quite "most accurate ever"