Closure problem

{
  "id": "MLC-T-MET-004402",
  "term": "Closure problem",
  "field": "Meteorology and atmospheric science",
  "definition": "The challenge of representing the effects of unresolved small-scale atmospheric processes on larger, resolved scales in numerical models. This requires parameterizing the statistical behavior of these sub-grid phenomena. For example, turbulent fluxes of heat and momentum must be modeled rather than explicitly calculated due to computational limitations.",
  "url": "https://mlchart.com/terminology/meteorology/closure-problem/"
}