Evidence for Climate Change

Thousands of scientists around the world have developed tools to see changes to the Earth over time. These tools help us learn things we might not be able to see otherwise. For example, paleoclimatologists examine air bubbles trapped in ice to determine climate conditions from thousands of years ago. Paleoclimatologists know that the Earth warmed up about five degrees Celsius starting about 15,000 years ago. That warming happened pretty gradually, over about 5,000 years. The problem we have now is that the Earth is warming up nearly that much over just a couple of hundred years. It’s as if the stove was suddenly turned up.

ClimateScience-EP3-720_w_flash.f4v

Source: Climate Science in a Nutshell. Retrieved from http://www.pbslearningmedia.org/resource/e8d45c72-d829-437d-9fa7-4a34c009017c/e8d45c72-d829-437d-9fa7-4a34c009017c/ on January 3, 2014. 

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Last modified: Monday, 2 February 2015, 9:13 AM