Definition

Noun: An area within the Earth's stratospheric ozone layer, particularly near the polar regions, that experiences a severe and seasonal thinning or depletion of ozone concentration.

Usage

The term "ozone hole" is used to describe a specific atmospheric phenomenon, not a literal hole. It refers to a region where the protective ozone layer is significantly less dense than normal. * Scientists monitor the size of the ozone hole over Antarctica each spring. * International treaties were enacted to reduce chemicals that cause the ozone hole. * The discovery of the ozone hole raised global environmental concerns.

Advanced Usage

• Formal/Scientific Context: Often discussed in relation to chlorofluorocarbons (CFCs), the Antarctic vortex, and ultraviolet (UV) radiation.
  • Satellite data is crucial for tracking the annual formation and recovery of the ozone hole.
• Figurative Use: Sometimes used metaphorically to describe a severe deficiency or gap in a protective system.
  • The scandal revealed a major ozone hole in the company's compliance procedures.

Variants and Related Words

• Ozone Layer (noun): The region of the stratosphere containing a high concentration of ozone, which absorbs most of the Sun's ultraviolet radiation.
• Ozone Depletion (noun): The gradual thinning of the Earth's ozone layer caused by the release of chemical compounds.
• Polar Stratospheric Clouds (noun): Clouds that form in the polar winter stratosphere and play a key role in ozone hole chemistry.

Synonyms

• Ozone depletion area
• Antarctic ozone hole (when specifying the location)

Related Phrases

• Ozone hole recovery: The process of the ozone layer thickening and the hole shrinking due to the reduction of ozone-depleting substances.
  • The Montreal Protocol is credited with enabling the long-term ozone hole recovery.

Noun

1. an area of the ozone layer (near the poles) that is seasonally depleted of ozone