One-and-a-half order closure

{
  "id": "MLC-T-MET-007686",
  "term": "One-and-a-half order closure",
  "field": "Meteorology and atmospheric science",
  "definition": "A turbulence closure scheme used in atmospheric models that parameterizes turbulent fluxes based on prognostic equations for turbulent kinetic energy (TKE) and a diagnostic length scale. This method provides a more sophisticated representation of turbulence than first-order closures by accounting for the transport and production of TKE. It is commonly applied in boundary layer models.",
  "see_also": [
    "first-order closure",
    "K'' theory",
    "second-order closure",
    "nonlocal closure",
    "Reynolds averaging",
    "closure assumptions"
  ],
  "url": "https://mlchart.com/terminology/meteorology/one-and-a-half-order-closure/"
}