What gas is primarily responsible for warming the atmosphere in the stratosphere?

• A. Carbon Dioxide
• B. Methane
• C. Ozone
• D. Nitrous Oxide

Answer: (C)

Ozone is primarily responsible for warming the atmosphere in the stratosphere because it absorbs a significant portion of the sun's ultraviolet (UV) radiation. This absorption process generates heat, contributing to the temperature increase within the stratosphere. The presence of ozone in this layer acts as a protective shield, preventing harmful UV radiation from reaching the Earth's surface, while simultaneously playing a crucial role in regulating the temperature of the stratosphere.

In contrast, while carbon dioxide and methane both have warming effects in the troposphere, their roles are more pronounced in that layer of the atmosphere rather than in the stratosphere. Nitrous oxide, although a greenhouse gas, also does not play a significant role in the stratosphere compared to ozone. Therefore, the unique properties of ozone, including its ability to absorb UV radiation and produce heat, make it the key gas responsible for warming in the stratosphere.