Dry air

In meteorology and thermodynamics , dry air describes completely anhydrous air . Dry air is the borderline case to moist air and represents the left edge in the Mollier hx diagram with x = 0 and the highest density at a given temperature.

The dry air is used in theoretical meteorology, for example, to formulate the virtual temperature .

Dry air at sea level has a global mean molar mass of currently around 28.96  g / mol . The value of the standard atmosphere is defined as 28.9644 g / mol.

Trivia

Colloquially, dry air means air with a comparatively low relative humidity . The low water vapor partial pressure in the air accelerates the drying out of mucous membranes , eyes and skin surface .

See also

• Dry adiabatic temperature gradient

Individual evidence

1. ^ Günter Warnecke: Meteorology and Environment: An Introduction . Ed .: Springer-Verlag. Berlin Heidelberg 1991, ISBN 978-3-642-59214-0 , pp. 14 .