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19.3: Global Wind Patterns

19.3: Global Wind Patterns. http://www.toonpool.com/user/589/files/wind_farm_desert_island_128775.jpg. Factors that Affect Winds. Temperature difference between equatorial regions and the poles Rotation of the Earth. www.physicalgeography.net. wattsupwiththat.com. Factors that Affect Winds.

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19.3: Global Wind Patterns

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  1. 19.3: Global Wind Patterns http://www.toonpool.com/user/589/files/wind_farm_desert_island_128775.jpg

  2. Factors that Affect Winds • Temperature difference between equatorial regions and the poles • Rotation of the Earth www.physicalgeography.net wattsupwiththat.com

  3. Factors that Affect Winds • Locations of the Continents • Time of year • Local topography (mountains, valleys, plains, etc.) wallpaperstock.net science-class.net

  4. Winds on a Non-rotating Earth • Warm air near the equator would rise and move toward the poles aloft • Cold air near the poles would move toward the equator at the surface

  5. Winds on a Non-rotating Earth http://universe-review.ca/I09-15-circulation1.jpg

  6. Effects of Earth’s Rotation • Coriolis effect prevents air from flowing straight to equator from poles • Also, air from the equator cools & sinks long before reaching the poles

  7. Three-Celled Circulation Model 3-Celled Circulation Animation

  8. Three-Celled Model Weaknesses • Mid-latitude (between 30° & 60° latitude) winds are oversimplified • Effects of continents or seasons not accounted for • Upper-level winds are more complicated than the model shows

  9. Three-Celled Model Strengths • Latitudes other than between 30° & 60° are fairly accurate • Model is an average; good for climate studies (long-term pattern)

  10. Wind and Pressure Belts • Intertropical Convergence Zone (ITCZ): low pressure zone created by maximum heating at the equator principiojoanne2196.blogspot.com

  11. Wind and Pressure Belts • The ITCZ is hot & humid with little or no wind; rain is frequent (doldrums) tnhsprgteam.blogspot.com

  12. Wind and Pressure Belts ITCZ encircles the Earth; migrates north and south depending on the season en.wikipedia.org

  13. The ITCZ: Can U find it? http://cawcr.gov.au/bmrc/clfor/cfstaff/jmb/03May15a.html

  14. Three-Celled Circulation Model www.newmediastudio.org

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