How radiation affects ice age

From the experiment I learned that sand absorbs more heat from the sun than both water and soil. Sand cools very slow, retaining the heat for a long time. Radiation pertains to my topic, Ice Age, because when sun`s radiation gets trapped in the atmosphere the earth doesn't heat, causing cooler temperatures. Carbon dioxide absorbs all infrared radiation available to it in about 10 meters, and water vapor in less than one meter. These substances shorten the distance that some of the radiation would travel. A shorter distance may cause global cooling.