Altostratus cloud

{
  "id": "MLC-T-CHM-000460",
  "term": "Altostratus cloud",
  "field": "Chemistry",
  "definition": "A mid-level atmospheric cloud characterized by a grayish or bluish sheet or layer of uniform or fibrous appearance. These clouds are of sufficient translucence to reveal the sun or moon as if viewed through ground glass, a phenomenon known as watery sun. Altostratus clouds form at altitudes of 2,000 to 7,000 meters (6,500 to 23,000 feet) and are composed of a mixture of water droplets and ice crystals.",
  "subject": "Chemistry and the Environment",
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2180 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/altostratus-cloud/"
}