met117 - T4 RH4 T3 RH3 T2 RH 2 T1 RH1 Temperature and...

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Meteorology 08/04/2008 01:09:00 Pressure Gradient [continued] in upper air, net force will change either speed or direction; this net force is  centripetal force.  friction plays a role further down in the atmosphere; friction is  directed opposite to the motion of a system. Low-level air windspeeds tend to be slower because of friction high pressure: air diverges outward; low pressure: air converges inward eckmann spiral: visualization of what happens to velocity when going from  high to low level [changes direction and magnitude] CFl<CFg<CFh         Vl<Vg<Vh Air Masses air mass: body of air that has achieved equilibrium with the underlying surface  after remaining over the same area for a period of time  [hundreds of square  miles]
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Unformatted text preview: T4 RH4 T3 RH3 T2 RH 2 T1 RH1 Temperature and Relative humidity are uniform within certain levels throughout the cross-section • areas of calm air masses: equator [doldrums]; 30˚N; 90˚N combinations of temp/humid warm/moist [mid-latitude ocean]; mT [maritime tropical] warm/dry [desert]; cT [continental tropical] cold/moist [extreme-latitude ocean]; mP [maritime polar] cold/dry [extreme-latitude land]; cP [continental polar] • continental air masses tend to bring more extreme weather maritime tropical o in summer, air rises and creates less stable weather as the day goes on; rain usually occurs in the afternoon. o in winter, air mass is more stable because air is warmer than land. • 08/04/2008 01:09:00 ← 08/04/2008 01:09:00 ←...
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