Which atmospheric layer contains the ozone layer?

The ozone layer is primarily located in the stratosphere, which is the second layer of Earth's atmosphere, situated above the troposphere and below the mesosphere. This layer is crucial because it contains a high concentration of ozone (O3) molecules, which absorb the majority of the sun's harmful ultraviolet (UV) radiation. This protective function is vital for life on Earth, as excessive UV exposure can lead to increased risks of skin cancer and other health issues, as well as harm to ecosystems.

The stratosphere is characterized by a temperature increase with altitude, which is a result of the absorption of UV radiation by the ozone. This temperature inversion distinguishes it from the troposphere, where temperature typically decreases with height, and from the other upper layers like the mesosphere and thermosphere. Understanding the location and role of the ozone layer within the stratosphere highlights its significance in maintaining the balance of life on Earth and protecting it from solar radiation.