The layer of the atmosphere rich in ozone gas is the stratosphere. More specifically, the ozone layer resides within the stratosphere, typically between 10 and 30 miles (15 and 50 kilometers) above Earth's surface. This concentration of ozone is crucial because it absorbs most of the Sun's harmful ultraviolet (UV) radiation, protecting life on Earth.
Understanding the Ozone Layer
The ozone layer isn't a distinct layer with clearly defined boundaries, but rather a region of higher ozone concentration within the stratosphere. The amount of ozone varies geographically and seasonally.
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Ozone Formation: Ozone (O3) is formed when ultraviolet (UV) radiation from the sun splits oxygen molecules (O2) into individual oxygen atoms (O). These atoms then combine with other oxygen molecules to form ozone.
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Ozone Depletion: Human-made chemicals, such as chlorofluorocarbons (CFCs), have significantly depleted the ozone layer in certain areas, most notably the Antarctic ozone hole. International agreements, like the Montreal Protocol, have aimed to reduce the production and release of these ozone-depleting substances.
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Importance of the Ozone Layer: The ozone layer's ability to absorb UV radiation is vital. UV radiation can cause sunburn, skin cancer, cataracts, and damage to plants and ecosystems.
This concentration of ozone in the stratosphere is what we refer to as the ozone layer. While ozone at ground level is a pollutant, the ozone layer in the stratosphere is essential for life on Earth.
