1 sentence 2 why does it oscillate along year 1

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Unformatted text preview: n Belt) (1) Why is there a Tropical Rain Belt? (1 sentence) (2) Why does it oscillate along year? (1 sentence) Next: heating at equator + rotation of Earth Heating at equator Sun heats air at equator, air expands & rises Warm moist air rises & cools down, water vapor condenses, clouds form, rainfall Heating at equator Sun heats air at equator, air expands & rises Warm moist air rises & cools down, water vapor condenses, clouds form, rainfall Eventually, air ceases to rise (cooler, thermoclines), spreads N or S Air (now dry) sinks as it cools (at ca. 30° latitude), spreads N or S, draws moisture away from land, creating deserts This creates “circulation cells”; 3 on each side of the equator: Hadley Cells, Ferrel Cells, Polar Cells Global wind patterns if no rotation: air would flow directly from high to low pressure; (e.g., in Hadley cells, towards equator) with rotation: air in circulation cells is deflected, creating global wind patterns Winds moving from lesser to greater circumference deflect against spin (towards equator: deflected westwards) Global wind...
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