Geosci 105 - -winds strong blowing from north east trade...

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-also ice near the poles reflects much of the energy that reaches the surface there -effect it net heat gain and surplus in tropics, net heat deficit in polar areas -Global sea surface temperatures -equatorial regions receive more insolation (solar radiation input) each year than polar regions, so sst’s are warmer in the tropics. -Wind -driven by pressure differences -air flows from high pressure to low pressure -rising warm, humid air creates low pressure -sinking cold, dry air creates high pressure -Coriolis Effect -the earth is rotating -eastward rotation of earth deflects any freely moving mass away from a straight line -Atmospheric circulation cells -air density differences interact with the coriolis effect to produce a number of circulation cells driven by convection: -0 to 30 degrees latitude: Hadley -moves east to west
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Unformatted text preview: -winds strong blowing from north east- trade winds=surface winds- part of Hadley cell-trade winds (easterlies) are surface winds of Hadley cells-30-60 degrees: Ferrel Cells-westerlies are surface winds centered around 45 degrees north and south latitude-60-90 degrees: Polar cells-easterlies-wind patterns-where air is ascending and descending between cells, calm air prevails.-equatorial doldrums or ITCZ (intertropical convergence zone)-warm, humid air ascends = heavy rainfall-around 30 degrees lie the horse latitudes-cool, dry air descends= desserts and high salinity oceans-Well-organized cells are idealized; reality is more complicated and changes constantly-Sea Breezes and Land Breezes-afternoon: cool air descends into water- cooler sea, warm air ascends off land- warmer land...
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