My Research project here at the University of Minnesota's geology and geophysics summer internship was to use a global climate model of intermediate complexity to study if whether or not an "overshoot" emissions scenario would cause irreversible climate change. An overshoot scenario is when carbon dioxide emissions cross a certain, "dangerous" threshold of atmospheric carbon dioxide concentration, but then drop back down to "safe" levels shortly thereafter. The goal of the research I preformed was to determine if crossing that "dangerous" carbon dioxide threshold would force the climate system into a state from which it could not return. The results from my research is that climate change is in fact reversible for an overshoot scenario. In other words, even if different emissions scenarios having widely-varying emissions paths, their end results will be very similar, as long as the total carbon inventory for each scenario is the same. However, my results did show that there will be a period during the time of actual overshoot where temperature and other associated variable will be elevated, sometimes for several hundred years, before returning back to the level of a non-overshoot scenario. That could cause potential problems, and suggests that the overshoot scenario may not be the best way to mitigate climate change.