Absolute Humidity
Absolute Humidity
Absolute Humidity (pronunciation: ab-so-lute hu-mi-di-ty) is a term used in Meteorology and Physical Geography to describe the total amount of water vapor present in a given volume of air. It is expressed in grams of moisture per cubic meter of air (g/m³).
Etymology
The term "Absolute Humidity" is derived from the Latin words "absolutus", meaning "free, unrestricted", and "humidus", meaning "moist, wet". It was first used in the field of meteorology in the late 19th century.
Definition
Absolute Humidity is defined as the mass of water vapor divided by the volume of air or gas, including the water vapor itself. It is a measure of the actual amount of water vapor in the air, regardless of the air's temperature. The higher the amount of water vapor, the higher the absolute humidity.
Related Terms
- Relative Humidity: Relative Humidity is the ratio of the current absolute humidity to the highest possible absolute humidity (which depends on the current air temperature). A reading of 100 percent relative humidity means that the air is totally saturated with water vapor and cannot hold any more, creating the possibility of rain.
- Dew Point: Dew Point is the temperature at which the water vapor in a sample of air at constant barometric pressure condenses into liquid water at the same rate at which it is evaporated.
- Psychrometrics: Psychrometrics is the study of the physical and thermodynamic properties of gas-vapor mixtures.
See Also
External links
- Medical encyclopedia article on Absolute Humidity
- Wikipedia's article - Absolute Humidity
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