Relative vorticity

{
  "id": "MLC-T-MET-002298",
  "term": "Relative vorticity",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "The component of the vorticity vector perpendicular to the Earth's surface, calculated with respect to a local, rotating frame of reference. It quantifies the local rotation of a fluid parcel relative to the rotating Earth. Positive values indicate cyclonic rotation in the Northern Hemisphere and anticyclonic in the Southern Hemisphere.",
    "The sum of the rotation of an air parcel about the axis of the pressure system and the rotation of the parcel about its own axis."
  ],
  "synonyms": [
    "local vorticity"
  ],
  "see_also": [
    "geostrophic vorticity",
    "vorticity equation"
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/relative-vorticity/"
}