Fanning

{
  "id": "MLC-T-MET-000950",
  "term": "Fanning",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "A plume behavior observed when stable atmospheric conditions, such as an inversion layer, prevent vertical mixing of pollutants from a stack. The plume spreads horizontally in a narrow band, resembling a fan, with minimal vertical dispersion. This can lead to high concentrations of pollutants downwind at ground level.",
    "A pattern of plume dispersion in a stable atmosphere, in which the plume fans out in the horizontal and meanders about at a fixed height."
  ],
  "see_also": [
    "looping",
    "coning",
    "fumigation"
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/fanning/"
}