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Global Wind Patterns

Global Wind Patterns. Winds in the Earth’s Atmosphere are divided into 3 main Belts. Tropical Easterlies 0-30° latitude Prevailing Westerlies 30-60° latitude Polar Easterlies 60-90° latitude. Global Wind Patterns.

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Global Wind Patterns

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  1. Global Wind Patterns • Winds in the Earth’s Atmosphere are divided into 3 main Belts • Tropical Easterlies • 0-30° latitude • Prevailing Westerlies • 30-60° latitude • Polar Easterlies • 60-90° latitude

  2. Global Wind Patterns • The easterly trade winds of both hemispheres converge at an area near the equator called the "Intertropical Convergence Zone (ITCZ)", producing a narrow band of clouds and thunderstorms that encircle portion of the globe. • The worldwide system of winds, which transports warm air from the equator where solar heating is greatest towards the higher latitudes, is called the general circulation of the atmosphere, and it gives rise to the Earth's Climate Zones.

  3. Global Wind Patterns • The general circulation of air is broken up into a number of cells, the most common of which is called the Hadley cell. • Sunlight is strongest nearer the equator. Air heated there rises and spreads out north and south. After cooling the air sinks back to the Earth's surface within the subtropical climate zone between latitudes 25° and 40°.

  4. Global Wind Patterns • Cool descending air stabilizes the atmosphere, preventing much cloud formation and rainfall. Consequently, many of the world's desert climates can be found in the subtropical climate zone. • Surface air from subtropical regions returns towards the equator to replace the rising air, so completing the cycle

  5. Global Wind Patterns http://www.math.montana.edu/~nmp/materials/ess/atmosphere/expert/activities/circulation/ http://wwwghcc.msfc.nasa.gov/GOES/globalir.html http://www.ssec.wisc.edu/data/comp/latest_moll.gif http://www.bom.gov.au/lam/climate/levelthree/analclim/glbwnd.htm

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