Urban area effects on local climate
- Created by: Brad_ers_B
- Created on: 17-05-15 19:10
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- Urban areas effects on local climate
- Temperature
- Building materials
- Industries, buildings and vehicles
- "Pollution Dome"
- Fast water drainage = Reduced evapo-transpiration
- Annual mean = 0.5-0.8°C increase
- Winter minimum = 1.0-1.5°C increase
- Precipitation
- Urban heat island generating convection
- High-rise buildings generating turbulance, increased vertical motion
- Industrial water vapour and pollutants
- Quantity = 5-10% increase
- Relative humidity
- Annual mean = 6% decrease
- Winter = 2% decrease
- Summer = 8% decrease
- Visibility
- Fog in winter = 100% increase
- Fog in summer = 30% increase
- Wind speed
- Surface area of cities uneven
- High-rise buildings may slow air movement, can also speed it up with "canyons"
- Annual mean = 20-30% decrease
- Radiation
- Winter = 30% lower
- Summer = 5% lower
- Total on horizontal surface = 15-20% lower
- Pollution
- 1000% increase in Duse particles
- Temperature
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