Geography 2310A/B Study Guide - Vapor Pressure, Evaporation, Hygrometer
26 Nov 2014
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Document Summary
Absolute vs relative absolute humidity- the mass of water vapour in a unit volume of air. relative humidity- the ratio of the actual amount of water vapour in the air to the saturation value at the air"s temperature. The water vapour content of the air. Water vapour enters the atmosphere by evaporation and leaves by condensation. Dew point: a relative measure of the dryness of the air depression tair-tde. The temperature to which the air must be cooled, at constant pressure, to reach saturation. Tephigram- used to plot temperature, pressure and humidity humidity is high when the lines are close (elr and td) Mixing ratio- an absolute measure of humidity saturation (ws) -proportional to ambient air pressure. Saturation vapour pressure - is the vapour pressure when evaporation equals condensation; is the maximum vapour pressure that can exist at a given temperature; and it increases with increasing temperature.
