Global Winds

1. Global Winds What roles do composition, structure, and properties play in our atmosphere?

2. Coriolis Effect • Because the Earth rotates, and consists of a mixture of land and sea, the Coriolis Effect exists • The Coriolis Effect is the movement of particles (such as air) to the right in the Northern Hemisphere • How about the South? • They move to the left

3. Coriolis Effect

4. Global Winds • Global wind patterns are caused by: • Coriolis Effect • The land and sea makeup of Earth

5. 90 Warm Moist Air Rises 60 30 0 30 60

6. 90 Cool Dry Air Sinks Warm Moist Air Rises Cool Dry Air Sinks 60 30 0 30 60

7. 90 Cool Dry Air Sinks Warm Moist Air Rises Cool Dry Air Sinks 60 30 0 30 60 Cold Moist Air Rises Cold Moist Air Rises

8. 90 Cool Dry Air Sinks Warm Moist Air Rises Cool Dry Air Sinks 60 30 0 30 60 Very Cold Air Sinks Cold Moist Air Rises Cold Moist Air Rises Very Cold Air Sinks

9. H L 90 H Cool Dry Air Sinks Warm Moist Air Rises L Cool Dry Air Sinks 60 H L H 30 0 30 60 Very Cold Air Sinks Cold Moist Air Rises Cold Moist Air Rises Very Cold Air Sinks

10. H L 90 H L 60 H L H 30 0 30 60 Wind Moves from HIGH to LOW

11. 90 60 30 0 30 60 Objects are deflected to the RIGHT in the Northern Hemisphere And to the LEFT in the Southern Hemisphere

13. Remember! Wind gets its name from the direction it is blowing FROM!

14. Northern Wind Patterns • Polar Easterlies • 90 – 60 latitude from the east • Prevailing Westerlies • 60 – 30 latitude from the west • Trade winds • 30 – 0 latitude from the East

15. Latitude Nicknames • Horse Latitudes • 30 latitude • Named because the boats stalled and the horses had to go! • Doldrums / Intertropical Convergence Zone (ITCZ) • Equator • Trade winds converge from north and south • Named because boats also got stranded here

17. Jet Streams • Jet Streams format latitudes where wind systems come together • High speed westerly winds form high above the surface