Perturbation quantity

{
  "id": "MLC-T-MET-007879",
  "term": "Perturbation quantity",
  "field": "Meteorology and atmospheric science",
  "definition": "A variable representing a small deviation from a mean or basic state in a physical system. For example, in atmospheric dynamics, a perturbation quantity might be a small change in temperature, pressure, or wind velocity from its average value. These quantities are used in linear stability analysis to study the growth of disturbances.",
  "url": "https://mlchart.com/terminology/meteorology/perturbation-quantity/"
}