Ch13_Outline - Chapter13 TheAtmospherein Motion...

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 Chapter 13  The Atmosphere in  Motion
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    Atmospheric Pressure  Force exerted by the weight of the air  above Weight of the air at sea level  14.7 pounds per square inch  1 kilogram per square centimeter  Decreases with increasing altitude Units of measurement   Millibar   (mb) —Standard sea level  pressure is 1013.2 mb   
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    Atmospheric Pressure  Units of measurement   Inches of mercury—Standard sea level  pressure is 29.92 inches of mercury Instruments for measuring Barometer  Mercury barometer   Invented by Torricelli in 1643  Uses a glass tube filled with mercury         
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    A Mercury  Barometer Figure 13.2
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    Atmospheric Pressure  Instruments for measuring Barometer  Aneroid barometer   "Without liquid"  Uses an expanding chamber  Barograph  (continuously records the air  pressure)
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    Aneroid Barometer Figure 13.4
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    Factors Affecting Wind Horizontal movement of air    Out of areas of high pressure  Into areas of low pressure Controls of wind Pressure gradient force (PGF)  Isobars Lines of equal air pressure  Pressure gradient Pressure change over  distance 
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    Isobars on a Weather Map Figure 13.5
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    Factors Affecting Wind Controls of wind Coriolis effect   Apparent deflection in the wind direction  due to Earth's rotation     Deflection is to the right in the Northern 
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Ch13_Outline - Chapter13 TheAtmospherein Motion...

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