Chapter04b - Atmospheric Moisture: Relative Humidity and...

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Atmospheric Moisture: Relative Humidity and Dew Point
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RECAP Hydrological cycle : transport of water and energy. Humidity : the water content in the air. Absolute Humidity : the mass of water vapor in a fixed volume of air, i.e.  the water vapor density. Specific Humidity : the mass of water vapor in a fixed total mass of air. Water mixing ratio : the mass of water vapor in a fixed mass of the  remaining dry air. Actual vapor pressure : the amount of water vapor in terms of the amount  of pressure exerted by the water vapor molecules alone. Dalton’s law. Saturation vapor pressure : the pressure that the water vapor molecules  would exert if the air were saturated, i.e. the maximal vapor pressure at a  given temperature T.
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Humidity Humidity :  the  a m o unt o f wa te r in the  a ir. Absolute humidity : the  m a s s  o f wa te r va po r in a  unit  vo lum e  o f a ir. Specific humidity : the  m a s s  o f the  wa te r va po r  c o m pa re d to  the  to ta l m a s s  o f the  a ir pa rc e l.   air of volume vapor water of mass AH = air of mass total vapor water of mass SH = air dry of mass vapor water of mass MR =
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This note was uploaded on 01/26/2012 for the course MET 1010 taught by Professor Matchev during the Spring '08 term at University of Florida.

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Chapter04b - Atmospheric Moisture: Relative Humidity and...

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