specific humidity

American

noun

the ratio of the mass of water vapor in air to the total mass of the mixture of air and water vapor.

specific humidity British

noun

the mass of water vapour in a sample of moist air divided by the mass of the sample

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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specific humidity vs. relative humidity

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specific humidity

He found that an air mass retains the same specific humidity and potential temperature throughout its journey from the polar to the temperate zone.

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