Felzer checked his results against earlier LGM vegetation scenarios based on data from fossilized pollen retrieved from lake cores. His simulated vegetation matched up fairly well

with these geological reconstructions of plant life. Where differences exist, a colder simulation might help produce the correct vegetation, since there is evidence in the data for a slightly colder world than the model shows, especially in the tropics. According to Felzer, the model is accurate enough in showing past climates and vegetation that it can be a useful tool in simulating the future.

The two NCAR models used in the study were GENESIS (Global Environmental and Ecological Simulation of Interacitve Systems) created by Starley Thompson and Dave Pollard with funding from the Environmental Protection Agency, and EVE (Equilibrium Vegetation Ecology Model) developed by Bergengren and also funded by the EPA.