Mixed Rossby-gravity wave

{
  "id": "MLC-T-MET-010624",
  "term": "Mixed Rossby-gravity wave",
  "field": "Meteorology and atmospheric science",
  "definition": "An equatorially trapped wave that behaves like a Rossby wave at long zonal scales and like an inertia-gravity wave at short ones, also called a Yanai wave. Its crests move westward, with a period of about 4 to 5 days and a zonal wavelength near 10,000 kilometers, while its energy travels upward into the stratosphere. Its north-south wind peaks at the equator, where the east-west wind vanishes.",
  "synonyms": [
    "Yanai wave"
  ],
  "see_also": [
    "Rossby-gravity wave"
  ],
  "url": "https://mlchart.com/terminology/meteorology/mixed-rossby-gravity-wave/"
}