Natural Forcings: human forces that influence the climate.

In the novel, What We Know About Climate Change, by Kerry Emanuel, Emanuel points out many significant issues that contribute to one another that can lead to our extinction. He specifies that our earth goes through a variety of stages that have been going at a constant rate. It has been a balanced out temperature for the past 2 million years. The same ice age has occur 100,000 years after another until now. Our change in temperature is due to the earth heating up already in 2003 a degree. If we continue to consume and pollute at the rate we are by the next decade this earth will continue to raise in temperature leading to the extinction of the human race.

Emanuel has said "an important and difficult issue in detecting anthropogenic climate change is telling the difference between natural climate variations-both free and forced-and those that are forced by our own activities" (Emanuel:37) Their are already natural forcings affecting our earth all the way back to the 19Th century, aspects like the greenhouse gases has started this whole cycle and slowly but surely contributing to this climate change more everyday. Emanuel has said that the temperatures that have been recorded in the last thousand years have been unprecedented. This proxy that we have been following is shaped like a hockey stick showing the significant change in temperature in the past 100 years. The imperfect proxy we live in now can be shown by the complex endeavor of a computer model of it last 100 years.