Tell - tale patterns have been measured in the annual cycle, the daily cycle, the structure of the atmosphere and in outgoing infrared radiation. (skepticalscience.com)
Gases like carbon dioxide present in the atmosphere absorb outgoing infrared radiation from the earth's surface causing some heat to be retained. (newstatesman.com)
They cool the climate by reflecting incoming sunlight but can also warm the climate by trapping outgoing infrared radiation from the surface. (skepticalscience.com)