Planetary Surface Winds

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  • Created by: OctaviaL
  • Created on: 29-05-16 19:03
What are winds?
Horizontal movements of air on Earth's surface as a result of differences in air pressure.
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What direction do winds blow?
From high to low pressure.
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What happens if air temperature increases?
Air expands and rises, reducing pressure.
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What happens if air temperature decreases?
Air becomes denser and sinks, increasing pressure.
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What is the pressure gradient?
The gradual change seen in the pattern of isobars on a weather map.
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What influences wind direction at the small scale?
Land and sea.
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What can wind affect?
Temperature.
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What affects temperature of the wind?
It's origin and the surface over which it has travelled.
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Why in summer do winds blowing onto land from the sea reduce air temperature?
The sea over which they have travelled is cooler than the land surface.
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Where are polar easterlies found and which direction do they blow?
Polar cell. From North-East to South-West.
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Where are the westerlies found and which direction do the blow?
Ferrel cell. From South-West to North-East.
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Where are the trade winds found and which direction to they blow?
Hadley cell. North-East to South-West in the Northern hemisphere, South-East to North-West in the Southern Hemisphere.
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Other cards in this set

Card 2

Front

What direction do winds blow?

Back

From high to low pressure.

Card 3

Front

What happens if air temperature increases?

Back

Preview of the front of card 3

Card 4

Front

What happens if air temperature decreases?

Back

Preview of the front of card 4

Card 5

Front

What is the pressure gradient?

Back

Preview of the front of card 5
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