Filtering approximations

{
  "id": "MLC-T-MET-005575",
  "term": "Filtering approximations",
  "field": "Meteorology and atmospheric science",
  "definition": "Mathematical techniques applied to atmospheric equations to remove high-frequency, non-meteorological waves, such as sound waves and gravity waves, which are not relevant to large-scale weather prediction. These approximations simplify the governing equations, making them more computationally tractable for numerical weather models. The geostrophic approximation is a common example, filtering out fast-moving oscillations.",
  "url": "https://mlchart.com/terminology/meteorology/filtering-approximations/"
}