F''-plane

{
  "id": "MLC-T-MET-005743",
  "term": "F''-plane",
  "field": "Meteorology and atmospheric science",
  "definition": "An approximation that expands the Coriolis parameter about a reference latitude and keeps terms through the second derivative, so that it varies quadratically with northward distance instead of linearly as in the beta-plane approximation. The f-plane keeps only the constant term, and the beta plane adds the first derivative. It serves as a higher-order treatment of planetary rotation in theoretical studies of atmospheric and oceanic waves.",
  "url": "https://mlchart.com/terminology/meteorology/f-plane/"
}