relative_humidity_from_mixing_ratio

metpy.calc.relative_humidity_from_mixing_ratio(mixing_ratio, temperature, pressure)

Calculate the relative humidity from mixing ratio, temperature, and pressure.

Parameters:

• mixing_ratio (pint.Quantity) – Dimensionless mass mixing ratio
• temperature (pint.Quantity) – Air temperature
• pressure (pint.Quantity) – Total atmospheric pressure

Returns:

pint.Quantity – Relative humidity

Notes

Formula based on that from [Hobbs1977] pg. 74.

\[RH = \frac{w}{w_s}\]

• \(RH\) is relative humidity as a unitless ratio
• \(w\) is mixing ratio
• \(w_s\) is the saturation mixing ratio

See also

mixing_ratio_from_relative_humidity(), saturation_mixing_ratio()