permafrost

{
  "id": "MLC-T-MET-002019",
  "term": "permafrost",
  "field": "Meteorology and atmospheric science",
  "definition": "A layer of soil at varying depths below the surface in which the temperature has remained below freezing continuously from a few to several thousands of years.",
  "synonyms": [
    "perennially frozen ground",
    "pergelisol",
    "permanently frozen ground"
  ],
  "see_also": [
    "pereletok",
    "active layer"
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/permafrost/"
}