Ozone hole

{
  "id": "MLC-T-MET-001974",
  "term": "Ozone hole",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "A severe depletion of stratospheric ozone over the Antarctic region, occurring annually during the Southern Hemisphere spring. This phenomenon is primarily caused by chemical reactions involving chlorine and bromine compounds, largely from human-made chlorofluorocarbons (CFCs) and halons, on the surface of polar stratospheric clouds. The largest ozone hole recorded was in 2000, covering approximately 29.9 million square kilometers.",
    "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."
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/ozone-hole/"
}