Global Winds and The Global Winds and The Jet StreamsJet Streams

How do global winds and the How do global winds and the jet stream influence weather jet stream influence weather

and climatic conditions?and climatic conditions?

Global WindsGlobal Winds

Global winds are found in each Global winds are found in each convection region. convection region. • TropicalTropical 0°-30° North or South of the 0°-30° North or South of the

equator. equator. • TemperateTemperate 30°-60° North or South of 30°-60° North or South of

the equator. the equator. • PolarPolar 60°-90° North or South of the 60°-90° North or South of the

equator (to the North or South Poles). equator (to the North or South Poles).

Global WindsGlobal Winds

The The Trade WindsTrade Winds blow from East to blow from East to West in the West in the Tropical RegionTropical Region; ; moving warm moving warm tropical air in that tropical air in that climate zone. climate zone.

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Global WindsGlobal Winds

The The Prevailing Prevailing Westerly WindsWesterly Winds blow from west to blow from west to east in the east in the Temperate Temperate RegionRegion. .

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Global WindsGlobal Winds The The Temperate ZoneTemperate Zone

temperatures are temperatures are affected most by the affected most by the changing seasons, but changing seasons, but since the since the Westerly Westerly Wind BeltWind Belt is in that is in that region, the weather region, the weather systems during any systems during any season move from season move from west to east. west to east.

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Global WindsGlobal Winds Since the United States is in the Since the United States is in the

Westerly Wind BeltWesterly Wind Belt, the weather , the weather systems move across the country from systems move across the country from West to East. West to East.

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Global WindsGlobal Winds

Tropical weatherTropical weather systems, for example systems, for example hurricaneshurricanes, are , are moved in the moved in the prevailing direction of prevailing direction of the the Trade WindsTrade Winds. If . If they enter the they enter the Westerly Wind BeltWesterly Wind Belt, , they are often turned, they are often turned, and move in that and move in that direction of the direction of the prevailing wind. prevailing wind. Start: W E

Change: W E

Global WindsGlobal Winds

The The Polar WindsPolar Winds blow Northeast to blow Northeast to West in the West in the Polar Polar RegionRegion moving moving cold polar air in cold polar air in that climate zone that climate zone from the poles from the poles toward the West. toward the West.

NE

W

Global WindsGlobal Winds The The Polar WindsPolar Winds

are in the are in the Polar Polar RegionRegion moving moving from from NE to WNE to W

The The Westerly Westerly Wind BeltWind Belt is in is in the the Temperate Temperate RegionRegion moving moving from from W to EW to E. .

The The Trade WindsTrade Winds are in the are in the Tropical Tropical RegionRegion moving moving from from E to WE to W..

Polar Winds

Westerly Wind Belt

Trade Winds

Jet StreamJet Stream

The The Jet StreamJet Stream is a fast-moving is a fast-moving ribbon of air that moves from West to ribbon of air that moves from West to East in the Northern Hemisphere East in the Northern Hemisphere around the Earth. around the Earth.

It dips and bends and Constantly It dips and bends and Constantly changes positions. changes positions.

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Jet StreamJet Stream

As these changes occur, air masses and As these changes occur, air masses and weather systems in its path are moved weather systems in its path are moved along by the fast moving air. along by the fast moving air.

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Jet StreamJet Stream The cold The cold Polar Jet StreamPolar Jet Stream can bring can bring

down cold, polar conditions from the down cold, polar conditions from the North.North.

N

Jet StreamJet Stream The The Subtropical Jet StreamSubtropical Jet Stream can can

bring warm tropical conditions from bring warm tropical conditions from the South (in the Northern the South (in the Northern hemisphere). hemisphere).

N

S