virtual_temperature#
- metpy.calc.virtual_temperature(temperature, mixing_ratio, molecular_weight_ratio=0.6219569100577033)#
Calculate virtual temperature.
This calculation must be given an air parcel’s temperature and mixing ratio. The implementation uses the formula outlined in [Hobbs2006] pg.80.
- Parameters
temperature (
pint.Quantity
) – Air temperaturemixing_ratio (
pint.Quantity
) – Mass mixing ratio (dimensionless)molecular_weight_ratio (
pint.Quantity
or float, optional) – The ratio of the molecular weight of the constituent gas to that assumed for air. Defaults to the ratio for water vapor to dry air. (\(\epsilon\approx0.622\))
- Returns
pint.Quantity
– Corresponding virtual temperature of the parcel
Examples
>>> from metpy.calc import virtual_temperature >>> from metpy.units import units >>> virtual_temperature(283 * units.K, 12 * units('g/kg')) <Quantity(285.039709, 'kelvin')>
Notes
\[T_v = T \frac{\text{w} + \epsilon}{\epsilon\,(1 + \text{w})}\]Changed in version 1.0: Renamed
mixing
parameter tomixing_ratio