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absolute humidity

absolute humidity depiction
Image from Meteorology Today by C. Donald Ahrens
© 1994 West Publishing Company



The ratio of the mass of water vapor to the volume occupied by a mixture of water vapor and dry air; it is measured in in grams of water vapour per cubic meter of air. Conversion to relative humidity (RH) can only be made when the temperature is known. For instance 15 g/m3 at 17.5°C equals 100% RH, while at 25°C it equals 65% RH, and at 30°C it equals 50% RH.


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   • HUMIDITY AND MOISTURE CONTROL






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