Aerodynamic roughness length

{
  "id": "MLC-T-MET-003334",
  "term": "Aerodynamic roughness length",
  "field": "Meteorology and atmospheric science",
  "definition": "A parameter representing the effective height above a surface where the wind speed theoretically becomes zero due to the presence of obstacles and surface irregularities. It quantifies the roughness of a surface in terms of its impact on airflow, influencing the vertical wind profile in the atmospheric boundary layer. Typical values range from a few millimeters for smooth surfaces to several meters for urban areas.",
  "synonyms": [
    "roughness length z 0"
  ],
  "see_also": [
    "Charnock's relation"
  ],
  "url": "https://mlchart.com/terminology/meteorology/aerodynamic-roughness-length/"
}