Ozone "Hole"

{
  "id": "MLC-T-ENV-020099",
  "term": "Ozone \"Hole\"",
  "field": "Environment",
  "definitions": [
    "A large area of the stratosphere with extremely low amounts of ozone.",
    "1. A thinning break in the stratospheric ozone layer. Designation of amount of such depletion as an \"ozone hole\" is made when the detected amount of depletion exceeds fifty percent. Seasonal ozone holes have been observed over both the Antarctic and Arctic regions, part of Canada, and the extreme northeastern United States.\n\n2. A severe depletion of stratospheric ozone over Antarctica that occurs each spring. The possibility exists that a hole could form over the Arctic as well. The depletion is caused by a chemical reaction involving ozone and chlorine, primarily from human produced sources, cloud particles, and low temperatures.\n\n3. Large area of the stratosphere with extremely low amounts of ozone."
  ],
  "subject": [
    "Air",
    "General environmental"
  ],
  "references": [
    "Ozone Layer Protection Glossary",
    "Terms of Environment",
    "NOAA Climate Program Office Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/ozone-hole/"
}