Particularly I am confused by an equation I'm given for specific humidity-- the ratio of the molecular weight of water and dry air ( 0.622 ) multiplied by the water vapor pressure, divided by ( total pressure-0.378 * water vapor pressure ).
12.
Maybe the math is not working at 4 am in the morning, but why subtract water vapor pressure from the total pressure of the air, if I'm trying to calculate specific humidity which tries to relate the amount of water vapor to the amount of " mixture ? " talk ) 08 : 16, 9 March 2009 ( UTC)
13.
There are three main measurements of humidity : absolute, relative and specific . "'Absolute humidity "'is the water content of air at a given temperature expressed in gram per cubic meter . "'Relative humidity "', expressed as a percent, measures the current absolute humidity " relative " to the maximum ( highest point ) for that temperature . "'Specific humidity "'is a ratio of the water vapor content of the mix to the total water content on a small basis.
