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Geography Climatology IEB Grade 12 Flashcards
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Why is there more precipitation in urban areas?
Why is there more precipitation in urban areas?
- Hygroscopic nuclei (salt; dust; smoke) allows condensation to occur
- Pollution increases rate of condensation
- Hot air causes strong upward convection currents, allowing thunderstorms to commonly occur
What type of wind(s) occur in a valley during the day?
What type of wind(s) occur in a valley during the day?
Anabatic winds that consist of an upslope wind and a valley wind
How does radiation fog occur and how does it disappear?
How does radiation fog occur and how does it disappear?
At night, if the temperature drops below the dew point, and below freezing, condensation occurs, forming droplets.
The droplets can become suspended in the warm air which results in radiation fog.
During the morning, sun rays penetrate the radiation fog whilst heating up the valley surface.
This causes warm air to rise, resulting in the fog to evaporate
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