Specific humidity

Specific humidity is a method of expressing the amount of aqueous vapor in air by using a ratio of water vapor to dry air. Specific humidity is expressed as a ratio of kilogram of water vapor, <math> m_w <math>, per kilogram of air, <math> m_a <math> .

That ratio can be given as:

<math> x = {m_w \over m_a} <math>

Partial pressure of water vapor and air can also be used to express the ratio.

See also

• Humidity
• Absolute humidity
• Relative Humidity
• Concentration
• Vapor pressure

External Links

• Glossary definition of specific humidity