Wind in urban areas Flashcards
1
Q
Why is average wind speed usually lower in cities than in rural areas?
A
Tall buildings create friction that slows down the moving air
2
Q
Why are there areas with a wind speed of zero?
A
These areas are totally sheltered from wind by buildings
3
Q
How are vortices (bodies of swirling air) caused?
A
Wind hits the face of a building - some of it’s deflected down, some around the sides and some over the top. When these winds hit other buildings or the ground they cause vortices
4
Q
What is the canyon effect?
A
Powerful gusts of wind when wind is channelled down streets
