Shell ice

{
  "id": "MLC-T-MET-010752",
  "term": "Shell ice",
  "field": "Meteorology and atmospheric science",
  "definition": "A thin, hollow layer of ice that forms on the surface of water, often enclosing a pocket of air or water beneath it. It develops when the surface freezes rapidly, or when water levels drop after initial freezing, leaving a void. This ice type is fragile and breaks easily under pressure.",
  "synonyms": [
    "cat ice"
  ],
  "url": "https://mlchart.com/terminology/meteorology/shell-ice/"
}