specific_humidity_from_mixing_ratio

metpy.calc.specific_humidity_from_mixing_ratio(mixing_ratio)

Calculate the specific humidity from the mixing ratio.

Parameters:

mixing_ratio (pint.Quantity) – Mixing ratio

Returns:

pint.Quantity – Specific humidity

Examples

>>> from metpy.calc import specific_humidity_from_mixing_ratio
>>> from metpy.units import units
>>> specific_humidity_from_mixing_ratio(19 * units('g/kg'))
<Quantity(18.6457311, 'gram / kilogram')>

See also

mixing_ratio, mixing_ratio_from_specific_humidity

Notes

Formula from [Salby1996] pg. 118.

\[q = \frac{w}{1+w}\]

• \(w\) is mixing ratio

• \(q\) is the specific humidity