Velopause

{
  "id": "MLC-T-MET-009973",
  "term": "Velopause",
  "field": "Meteorology and atmospheric science",
  "definition": "The level of minimum zonal (east-west) wind speed found in the summer mesosphere, typically at an altitude of about 85 kilometers. This boundary separates the westward-flowing mesospheric jet in the lower mesosphere from the eastward-flowing jet in the upper mesosphere. The velopause is an atmospheric feature analogous to the tropopause, which marks a temperature minimum.",
  "url": "https://mlchart.com/terminology/meteorology/velopause/"
}