lecture7feb708.ppt

lecture7feb708.ppt - 2. Ferrel cell : sinking motion at...

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Rising Air Tropopause stops upward flow Air has nowhere to go, so moves laterally north and south Air cools, begins to sink L
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Sinking Air Surface stops downward flow Air has nowhere to go, so moves laterally north and south Coriolis effect causes surface winds to deflect either right or left H
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Global Pressure Belts Temperature Intertropical Convergence Zone (ITCZ) Low 0º Polar High 90º N/S Dynamics Subtropical High 30º N/S Subpolar Low 60º N/S
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Circulation Cells Hadley: 0º - 30ºN/S Ferrel: 30ºN/S - 60ºN/S Polar: 60ºN/S - 90ºN/S
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B. Cells 1.   Hadley cell:   rising  motion at equator and sinking  motion at 30°N and 30°S
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Unformatted text preview: 2. Ferrel cell : sinking motion at 30and rising motion at 60, weak 3. Polar cell : rising motion at 60 and sinking motion at poles D. Winds 1. Northeast Trade winds (0 to 30N) 2. Southeast Trade winds (0 to 30S) 3. Westerlies (30 to 60 in both hemispheres: slightly stronger in Southern Hemisphere because no land to block winds ("Roaring Forties") 4. Polar Easterlies (60 to 90 in both hemispheres) Seasonal Migration ITCZ Jet Streams Figure 6.18 Major Ocean Currents Figure 6.22...
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lecture7feb708.ppt - 2. Ferrel cell : sinking motion at...

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