Thunderstorms, the Wind and Air Quality (AQA A-Level Geography): Flashcards

Warm air rises rapidly forming cumulonimbus clouds

Wind redirected down straight streets with reduced friction

Wind speed increases through narrow gaps between buildings

Overpressure builds up as wind hits building face

Low pressure develops with complex vortices forming

90%

Particles smaller than 10 micrometres

Trap pollutants over city preventing vertical air movement

Sunlight acting on nitrogen oxides and hydrocarbons

London, 2019