The range spans atmospheric concentration levels in 2100 from 430 to 480 ppm, which is comparable to the reduction of GHG emissions in 2050 to 41-72% below 2010 levels (about 22-63% below 1990 levels)]. In this study, we assume that non-Annex I countries commit to fulfill the three variants of the global emissions reduction targets in a range of 35-55% below 1990 levels in 2050.