Free air

{
  "id": "MLC-T-MET-005752",
  "term": "Free air",
  "field": "Meteorology and atmospheric science",
  "definition": "The atmosphere above the planetary boundary layer, where the influence of the Earth's surface friction and diurnal heating is minimal. In this region, atmospheric motions are primarily governed by the Coriolis force and pressure gradients. It typically begins a few hundred meters to a kilometer above the ground, depending on atmospheric stability.",
  "see_also": [
    "free atmosphere"
  ],
  "url": "https://mlchart.com/terminology/meteorology/free-air/"
}