The ozone layer is primarily located in the stratosphere.
Understanding the Stratosphere and the Ozone Layer
The stratosphere is a layer of Earth's atmosphere extending from about 10 to 50 kilometers above the surface. Ninety percent of the Earth's ozone resides within this layer. This ozone is crucial because it absorbs most of the Sun's harmful ultraviolet (UV) radiation, protecting life on Earth. The depletion of ozone in the stratosphere, particularly over Antarctica (known as the "ozone hole"), is a significant environmental concern. The ozone hole is defined as regions with total ozone below 220 Dobson Units (DU).
- Key takeaway: The majority of the ozone that protects us from harmful UV radiation sits in the stratosphere.
Importance of the Ozone Layer
The ozone layer's role in absorbing UV radiation is vital for several reasons:
- Protecting life: UV radiation can cause skin cancer, cataracts, and damage to plants and marine ecosystems.
- Maintaining atmospheric balance: The ozone layer plays a critical role in the Earth's overall atmospheric chemistry and temperature balance.
