What is the primary mechanism responsible for warming the stratosphere?

Question

Accepted Answer

The absorption of high-energy ultraviolet (UV) radiation by ozone gas.. Ozone in the upper atmosphere absorbs high-energy ultraviolet (UV) radiation coming from the sun. Source 2 states: "Ozone in the upper atmosphere absorbs high-energy ultraviolet (UV) radiation coming from the sun. " This absorption process warms the stratosphere.