Meteorology for Air Pollution Control Engineers9

Meteorology for Air Pollution Control Engineers9 - upward...

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1 n The surface of the ground heats and cools rapidly from  day to night and from summer to winter because solid  ground is a poor conductor of heat. n The surface of oceans and lakes heats and cools slowly,  mostly because their surface layers are stirred by the  winds and by natural convection currents.
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2 n Thus the heating or cooling of the air layer adjacent to  solid ground is much faster than that of air over bodies of  water. n The most spectacular example of this phenomenon is the  monsoon weather of India and parts of East Africa.
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3 n The summer sun warms the air above India more than the  air over the surrounding oceans, which causes strong 
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Unformatted text preview: upward motion of the air over India. n Moist air from over the surrounding warm oceans flows inward to fill the low-pressure region caused by this rising air. n This moist air rises, cools, and forms the monsoon rains on which Indian agriculture depends. 4 3. Vertical Motion in the Atmosphere n Most vertical motions in the atmosphere are caused by changes in air density. 3.1 Air Density Change with Temperature and Humidity n The density of any part of the atmosphere is given almost exactly by the perfect gas law: (1) / MP RT =...
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Meteorology for Air Pollution Control Engineers9 - upward...

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