Coriolis Effect Global Winds
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Transcript of Coriolis Effect Global Winds
Coriolis EffectGlobal Winds
Chapter 2.3Pages 57-60
Coriolis Effect• The effect of Earth’s rotation which makes
winds curve– Winds want to move in a straight line but the
earth rotates under them, making it seem as though the wind curved.
Coriolis Effect• In the Northern
hemisphere Earth rotates counter clock wise– All winds curve to
the right.
Coriolis Effect• In the Southern
hemisphere Earth rotates clock wise– All winds curve to
the left.
Global Winds• Winds that blow
steadily from specific directions over long distances.
• Caused by unequal heating of the surface.
Doldrums
Horse Latitudes
Horse LatitudesTrade Winds
Westerlies
Polar Easterlies
Trade Winds
WesterliesPolar
Easterlies
Global WindsH
L
HL
HLH
Global Winds
Doldrums
Horse Latitudes
Horse Latitudes
Trade Winds
Westerlies
Polar Easterlies
Trade Winds
Westerlies
Polar Easterlies
Exit PassWhat is the Coriolis Effect? (Why does it happen, and
what does it cause?)
Doldrums• Located: At the
equator
• Area of Low Pressure– Rising Air
• Definition: a state of inactivity or stagnation
• Winds: Calm
Doldrums
Horse Latitudes
Horse Latitudes
L
Horse Latitudes• Located: 30°N and
30°S• Area of high
pressure– Sinking air
• Winds: Calm– Sailors would get trapped
and run out of food and water, they threw their horses overboard.
Doldrums
Horse Latitudes
Horse Latitudes H
H
Trade Winds• Between the
– Equator and 30°N– Equator and 30°S
• Winds: Steady from the east– Sailors relied on
them to carry goods from Europe to West Indies and S. America.
Trade Winds
Westerlies
Polar Easterlies
Trade Winds
WesterliesPolar
Easterlies
Prevailing Westerlies• Location: Mid-
latitude winds – Between 30° & 60°N– Between 30° & 60°S
• Winds: From the west
• Cause our weather• Blow away from the
horse latitudes.
Trade Winds
Westerlies
Polar Easterlies
Trade Winds
WesterliesPolar
Easterlies
Polar Easterlies• Location: Between
– 60°N and 90°N– 60°S and 90°S
• Winds: FROM the east to west– Cold, low pressure
air from the poles sinks and flows away from the pole to the equator.
Trade Winds
Westerlies
Polar Easterlies
Trade Winds
WesterliesPolar
Easterlies
Jet Stream• 10km above the
Earth’s surface• Bands of high speed
winds– 200-400km/hr
• Blow from west to east
• Wanders north and south.
Exit PassDescribe two of the Global
Winds (Where is it located, H or L pressure, direction, etc.)