So, obviously the earth as a whole has dealt with pretty large climate changes in the past. (realclimate.org)
In light of historical evidence that it takes several decades to complete a major change in fuel use, this makes large climate change almost inevitable. (dotearth.blogs.nytimes.com)
If warming occurs at this pace, it will probably be the most rapid large climate change in the last 65 million years. (carnegiescience.edu)