ozone layer

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ozone layer

The ozone layer protects Earth from harmful ultraviolet radiation.

Definition
  1. Noun:
    • A protective atmospheric layer: The ozone layer is a region of Earth's stratosphere, located approximately 20 miles (32 kilometers) above the surface, that contains a high concentration of ozone (O₃) molecules.
    • A solar radiation shield: Its primary function is to absorb and block the majority of the sun's harmful ultraviolet (UV) radiation, particularly UV-B and UV-C rays, from reaching the Earth's surface.
Usage Examples
  • Noun:
    • The discovery of a hole in the ozone layer over Antarctica raised global environmental concerns.
    • International treaties like the Montreal Protocol were enacted to protect the ozone layer from depletion by human-made chemicals.
    • Scientists monitor the health of the ozone layer to assess the level of UV radiation reaching the planet.
Advanced Usage
  • "Ozone layer depletion": The thinning or reduction of the ozone layer's concentration, primarily caused by chlorofluorocarbons (CFCs) and other ozone-depleting substances.
    • The phase-out of CFCs has been crucial in slowing the rate of ozone layer depletion.
  • "Ozone layer recovery": The process by which the ozone layer is expected to heal and return to its former concentration levels over time due to regulatory actions.
    • Models predict full ozone layer recovery by the middle of the 21st century if current protocols are maintained.
Variants and Related Words
  • Ozone hole (n): A specific region, notably over the polar areas, where seasonal thinning of the ozone layer is particularly severe.
    • The Antarctic ozone hole forms each spring.
  • Stratospheric ozone (n): Ozone found in the stratosphere, as opposed to ground-level (tropospheric) ozone, which is a pollutant. This is the technical term for the ozone that constitutes the ozone layer.
    • Stratospheric ozone is beneficial, while tropospheric ozone is a component of smog.
Synonyms
  • Ozone shield: Emphasizes its protective function.
  • Ozonosphere: A more technical term for the layer of the atmosphere containing ozone.
Related Phrases
  • To protect the ozone layer: The collective action of preventing its destruction.
    • Global cooperation is needed to protect the ozone layer.
  • A breach in the ozone layer: Refers to an area of significant thinning or damage.
    • The reported breach in the ozone layer led to increased public awareness.
Related Concepts
  • Ultraviolet (UV) radiation: The type of solar radiation filtered by the ozone layer. Excessive exposure is linked to skin cancer and cataracts.
  • Montreal Protocol: The landmark international treaty designed to phase out the production of substances responsible for ozone depletion.
ozone layer

The ozone layer protects Earth from harmful ultraviolet radiation.

Noun
  1. a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun

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