Here's a breakdown:
* Ozone Layer: The stratosphere contains a layer of ozone gas (O3). Ozone is a powerful absorber of UV radiation, particularly in the UVB and UVC ranges.
* UV Absorption: When UV radiation from the sun hits ozone molecules, it breaks them apart. This process releases heat energy, which warms the surrounding air.
* Temperature Gradient: The absorption of UV radiation by ozone creates a temperature gradient in the stratosphere, with temperatures increasing with altitude. This is in contrast to the troposphere, where temperatures decrease with altitude.
Other factors contributing to the stratospheric temperature rise include:
* Infrared radiation: Some infrared radiation from the sun and Earth's surface also reaches the stratosphere and contributes to warming.
* Chemical reactions: Certain chemical reactions in the stratosphere, like those involving chlorine and bromine, can also release heat.
In summary, the absorption of UV radiation by the ozone layer is the dominant factor responsible for the temperature rise in the stratosphere. This process plays a crucial role in protecting life on Earth from harmful UV radiation.
