1. Absolute humidity
Air is a mixture of gases containing, in particular, water vapor in suspension.
Absolute humidity" is defined as the quantity of water vapour contained in the air. It is expressed in g/m3. The letter "W" is used to designate absolute humidity.
At a given temperature, 1 m3 of air can only contain a limited amount of water vapor. This limit is called the "saturation limit", and, is noted Ws . It increases very rapidly with temperature under normal atmospheric pressure conditions (1,013.2 hPa or 760 mmHg at sea level at 15°C).
millimeter of mercury (mmHg).
For example, 1 m3 of air at 0°C will contain a maximum of 3.9 g of water vapour, while at 20°C it may contain up to 15.2 g (figure
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Absolute humidity
Relative humidity. Degree of humidity
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