Chapter 7 Notes

Chapter 7 Notes - Chapter 7 Atmospheric Circulation...

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Chapter 7 – Atmospheric Circulation 17/03/2008 19:58:00 Definitions Water vapor—the gaseous form of water, occupying as much as 4% of its  volume Precipitation—liquid water or ice that falls from the air to Earth’s surface Coriolis effect—the eastward rotation of Earth on its axis deflects the moving  air or water (or any object that has mass) away from its initial course o In the northern hemisphere, objects curve to the right of the initial path o In the southern hemisphere, objects curve to the left of the initial path Atmospheric circulation cell—a large circuit of air o Hadley cell—a tropical atmospheric circulation cell, a pair of which  exists, one on each side of the equator Begins at the equator with warm, moist air lifted aloft in  equatorial low pressure areas and carried poleward.  At about  30 o  N/S latitude, it descends in a high pressure area.  Some of  the descending air travels equatorially along the surface, closing  the loop and creating the  trade winds Named for George Hadley o Ferrel cells—a mid-latitude atmospheric circulation cell, a pair of which  exist between 30 o  and 60 o  N/S latitude  begins when some of the air descending at 30 o  latitude turns  poleward rather than equatorward. Surface wind in this circuit is  again deflected to the right by the Coriolis effects, this time 
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This note was uploaded on 04/07/2008 for the course EOS 12 taught by Professor Murray during the Spring '08 term at Duke.

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Chapter 7 Notes - Chapter 7 Atmospheric Circulation...

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