Scientists develop computer Global Climate Models or GCMs based on estimates of future greenhouse gas emissions, climate forcing factors, and the laws of physics. Once they verify a GCM through accurately simulating Earth's climate history, they use the GCM to predict climate in the near future.
Global warming is epic, long-term study saysLast Updated on 2013-04-08 at 20:52
(CNN) -- Global warming has propelled Earth's climate from one of its coldest decades since the last ice age to one of its hottest -- in just one century.
A heat spike... More »
Model Climate SensitivityLast Updated on 2013-04-04 at 15:05
The response of climate to a perturbation such as a change in carbon dioxide concentration, or in the flux of energy from the sun, can be divided into two... More »