wet_bulb_potential_temperature#
- metpy.calc.wet_bulb_potential_temperature(pressure, temperature, dewpoint)[source]#
Calculate wet-bulb potential temperature.
This calculation must be given an air parcel’s pressure, temperature, and dewpoint. The implementation uses the formula outlined in [DaviesJones2008]. First, theta-e is calculated then use the formula from [DaviesJones2008]
\[\theta_w = \theta_e - exp(\frac{a_0 + a_1 x + a_2 x^2 + a_3 x^3 + a_4 x^4} {1 + b_1 x + b_2 x^2 + b_3 x^3 + b_4 x^4})\]where \(x = \theta_e / 273.15 K\).
When \(\theta_e <= -173.15 K\) then \(\theta_w = \theta_e\).
- Parameters:
pressure (
pint.Quantity
) – Total atmospheric pressuretemperature (
pint.Quantity
) – Temperature of parceldewpoint (
pint.Quantity
) – Dewpoint of parcel
- Returns:
pint.Quantity
– wet-bulb potential temperature of the parcel