Urban Meteorology
Urban meteorology studies atmospheric processes in urban environments and how buildings, materials, vegetation, and human activity modify local weather conditions.
Focus
- Surface-atmosphere exchanges in cities.
- Turbulence and flow modification by urban geometry.
- Heat and moisture fluxes, including anthropogenic contributions.
- Process-scale dynamics that shape observed urban climate patterns.
Typical questions
- How do street canyons alter wind speed and direction?
- How is heat stored and released by urban materials across the diurnal cycle?
- Under which synoptic conditions do urban heat islands intensify or weaken?
- How do cities modify turbulence, mixing height, and pollutant dispersion?
Relation to urban climate
Urban meteorology focuses on processes, while urban climate focuses on the resulting climatological patterns and distributions.
The dependency runs one way. The state of the urban atmosphere at any moment is the accumulated result of process-scale meteorology — the turbulence, the storage and release of heat by the urban surface, the canyon-scale radiative exchange. Urban climate statistics are what you get by aggregating that over time, which means a climatological pattern is never evidence for a mechanism on its own. This is why urban climatology and urban meteorology need each other: the statistics say what happens, and only the process work says why.
Methods
Urban meteorology uses in situ observations, flux measurements, mobile traverses, remote sensing, and numerical models ranging from urban canopy schemes to large-eddy simulation models.
See also: urban climate, urban climatology, urban atmosphere, urban surface, Anthropogenic heat