Urban boundary layer

{
  "id": "MLC-T-MET-009922",
  "term": "Urban boundary layer",
  "field": "Meteorology and atmospheric science",
  "definition": "The lowest part of the atmosphere directly influenced by an urban area, characterized by altered thermal, aerodynamic, and moisture properties compared to rural surroundings. This layer exhibits higher temperatures (urban heat island), reduced wind speeds, and increased turbulence due to buildings and impervious surfaces. Its depth and characteristics vary with time of day and meteorological conditions.",
  "see_also": [
    "Urban heat island",
    "urban canopy layer"
  ],
  "url": "https://mlchart.com/terminology/meteorology/urban-boundary-layer/"
}