1. Winds that blow steadily from specific directions over long distances
Global winds
Winds that blow steadily from specific directions over long distances

2. Created by unequal heating of earth’s surface

4. Example of sun’s rays with a flashlight

5. Global convection currents
Movement of air between the equator and the poles produce global winds

6. Coriolis effect makes winds curve

7. Prevailing Westerlies
Main Global wind belts
Prevailing Westerlies
Trade Winds
Polar Easterlies

8. Trade winds
Blow from the horse latitudes (30oN & S) toward the equator Sailors relied on trade winds to carry cargoes from Europe to the West Indies and South America

9. Prevailing Westerlies
Blow from the west to the east (name comes from where winds blow FROM) Play an important part in the weather of the United States

10. Polar easterlies
Cold air from the poles sinks and flows back toward lower latitudes The Coriolis Effect shifts these winds to the west, so they are called EASTERLIES. Has a major effect on the weather of the United States

11. Regions near the equator with little or no wind where warm air rises
Doldrums
Regions near the equator with little or no wind where warm air rises

12. Horse latitudes
Calm areas of falling air 30* N & S Called horse latitudes because sailors ran out of food and water for their horses here and had to throw them overboard

13. Jet Streams
About 10 km above Earth’s surface Blow from west to east at km/h Planes flying east can save time and fuel by flying in the jet stream