1. Wind Systems
Grade 8
Earth Science

2. Wind
Movement of air from an area of high pressure to an area of low pressure
Winds are named by their direction of origin

3. Wind Systems
Series of Global Winds created by Convection Currents and the Coriolis Effect

4. Global Winds
Doldrums
Equator
Doldrums

5. Global Winds Caused by Convection Cycles

6. Coriolis Effect The Earth is spinning on its axis once every 24 hours.
So when the cold dense air come down from the convection cycle the appear to “bend”

7. Doldrums
Windless zone at the equator

8. Global Winds
Doldrums
Equator
Doldrums

9. Trade Winds
Winds used to bring the “Trade” from England to America

10. Global Winds
Doldrums
Equator
Doldrums

11. Prevailing Westerlies
Winds used when sailing back to England from America
Winds that are responsible for most of our weather

12. Global Winds
Doldrums
Equator
Doldrums

13. Polar Easterlies
Winds at the Poles

14. Global Winds
Doldrums
Equator
Doldrums

15. Jet Streams The “Rivers of the Sky”
Narrow belts of wind located in the atmosphere
Greatly affect the movement of Air Masses