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Do Now – In Binders. Describe how wind is created. What is the relationship between density and pressure? What happens to air pressure as I hike up a mountain? What instrument measures air pressure?. Global Winds. What roles do composition, structure, and properties play in our atmosphere?.

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do now in binders
Do Now – In Binders
  • Describe how wind is created.
  • What is the relationship between density and pressure?
  • What happens to air pressure as I hike up a mountain?
  • What instrument measures air pressure?
global winds

Global Winds

What roles do composition, structure, and properties play in our atmosphere?

coriolis effect
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
global winds1
Global Winds
  • Global wind patterns are caused by:
    • Coriolis Effect
    • The land and sea makeup of Earth
slide6

90

Warm Moist Air Rises

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30

0

30

60

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Cool Dry Air Sinks

Warm Moist Air Rises

Cool Dry Air Sinks

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30

60

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90

Cool Dry Air Sinks

Warm Moist Air Rises

Cool Dry Air Sinks

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Cold Moist Air Rises

Cold Moist Air Rises

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Cool Dry Air Sinks

Warm Moist Air Rises

Cool Dry Air Sinks

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Very Cold Air Sinks

Cold Moist Air Rises

Cold Moist Air Rises

Very Cold Air Sinks

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Cool Dry Air Sinks

Warm Moist Air Rises

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Cool Dry Air Sinks

60

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Very Cold Air Sinks

Cold Moist Air Rises

Cold Moist Air Rises

Very Cold Air Sinks

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Wind Moves from HIGH to LOW

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Objects are deflected to the

RIGHT in the Northern Hemisphere

remember
Remember!

Wind gets its name

from the

direction it is blowing

FROM!

northern wind patterns
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
latitude nicknames
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
jet streams
Jet Streams
  • Jet Streams format latitudes where wind systems come together
  • High speed westerly winds form high above the surface