Adjoint equation

{
  "id": "MLC-T-MET-003305",
  "term": "Adjoint equation",
  "field": "Meteorology and atmospheric science",
  "definition": "A mathematical equation derived from a forward model, used to propagate information backward in time or space. It quantifies the sensitivity of a specific output (a cost function) to variations in the model's initial conditions or parameters. In meteorology, these equations are central to variational data assimilation schemes.",
  "see_also": [
    "adjoint sensitivity",
    "adjoint model",
    "tangent linear equation"
  ],
  "url": "https://mlchart.com/terminology/meteorology/adjoint-equation/"
}