CUE: Urban Wind And Fogs

Question 1

How is wind impacted by urban areas?

Answer 1

Urban structures interfere with wind by slowing, redirecting and disturbing air flow
•Buildings create friction and act as windbreaks resulting in wind speeds being 30% lower than in rural areas.

Question 2

How do urban areas affect wind?

Answer 2

• Urban canyons – narrow streets bordered by high buildings funnel and concentrate winds
• Venturi effect – a particularly violent form of gusting caused by very narrow gaps

Question 3

Why is fog and mist common in urban areas?

Answer 3

Fog (and mist) is encouraged in urban areas by the concentration of condensation nuclei –
- Especially during periods of cooler overnight temperatures.
- This was common during the industrial revolution