Definition - What does Absolute Humidity mean?
Absolute Humidity is the amount of water content in air at a given temperature. It is expressed in gram per cubic meter or kilogram per cubic meter. Absolute Humidity can also be expressed as the total mass of water vapor present per unit volume of moist air. Whenever the atmospheric pressure and temperature changes, Absolute Humidity also changes.
Petropedia explains Absolute Humidity
Absolute Humidity is one of the three types of humidity, the others being relative humidity and specific humidity.
When Absolute Humidity is expressed as the total mass of water vapor present per unit volume of moist air, the temperature of the atmosphere is not taken into the consideration. The Absolute Humidity in the atmosphere ranges from 0 to 30 degrees Celsius. Thus Absolute Humidity can be written as:
Absolute Humidity = mass of water vapor / net volume of air and water vapor mixture