Saturation vapor pressure
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The saturation vapor pressure is the vapor pressure of water when air is saturated with water (having the maximum amount of water vapor that air can hold for a given temperature and pressure). It is the vapor pressure usually found over liquid water, and is a dynamic equilibrium where condensation of water equals the evaporation of water. In general, the higher the temperature, the more water vapor the air can hold. The same holds true with increases in pressure. When air is at saturation vapor pressure, it is said to be at the dew point. Thus, at saturation vapor pressure, air has a relative humidity of 100%, and condensation occurs.
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