Layer of no motion

{
  "id": "MLC-T-MET-006897",
  "term": "Layer of no motion",
  "field": "Meteorology and atmospheric science",
  "definition": "A theoretical or observed depth in the ocean or atmosphere where horizontal currents are assumed to be negligible or zero. This concept is sometimes used as a reference level in dynamic calculations, particularly when determining absolute geostrophic currents from relative velocity profiles. Its actual existence and precise depth can vary and are subject to ongoing research.",
  "url": "https://mlchart.com/terminology/meteorology/layer-of-no-motion/"
}