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Air Currents

Air Currents. Chapter 16 Section 3. Wind. The movement of air from an area of high pressure (more dense-cooler) to an area of low pressure (less dense-warmer). Global Winds. How is wind formed- 2 Reasons. Global Temperature Patterns.

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Air Currents

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  1. Air Currents Chapter 16 Section 3

  2. Wind The movement of air from an area of high pressure (more dense-cooler) to an area of low pressure (less dense-warmer)

  3. Global Winds • How is wind formed- 2 Reasons

  4. Global Temperature Patterns The sun’s rays are weaker near the poles causing less warming. The air here is cool. Cool air sinks. The sun’s rays are stronger near the equator causing more warming. The air here is warm. Warm air rises

  5. Global Winds Hadley Cells.

  6. The Coriolis Effect Mr. Fetch’s Earth Science Classroom

  7. Global Winds Remember, winds are named from where they come. Polar Easterlies- From 90°N to 60°N- Deflected to right 60°N Prevailing Westerlies- From 30°N to 60°N- Deflected to right 30°N Easterly Trade Winds- From 30°N to O°- Deflected to right 0° Doldrums Easterly Trade Winds- From 30°S to 0°- Deflected to left 30°S Prevailing Westerlies- From 30°S to 60°S- Deflected to left 60°S Polar Easterlies- From 90°S to 60°S- Deflected to left

  8. ***Winds are named by the direction where they are coming from

  9. Polar Easterlies move E (east) to W (west) Brings the cold polar air

  10. Prevailing Westerlies Winds move W (west) to E (east) Move weather systems across the US ( United States)

  11. East Trade Winds Winds move E (east) to W (west) Early sailors used winds to navigate trade routes

  12. Doldrums Low Pressure Zone along the equator Very little wind Rains often

  13. NOAA Doldrums Description

  14. Jet streams belts of strong / fast winds near the top of the troposphere Moves W (west) to E (east) Jets fly faster when flying with Jet Stream Extra- - faster in winter Form between cold dry air and warm moist air

  15. Jet Stream

  16. Sea Breeze Convection current of air created during the day from the sea to land Land warms faster than the sea. Warm, less dense air over land rises; cooler, more dense air over sea sinks, creating a cool breeze to blow in from the sea

  17. Sea Breeze

  18. Land Breeze Convection current of air created at night from the land to sea Land cools faster than the sea. Cooler, more dense air over sinks and moves towards the sea; warmer air over the sea rises, creating a breeze from land to sea

  19. Land Breeze

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