vapor_pressure¶
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metpy.calc.
vapor_pressure
(pressure, mixing)[source]¶ Calculate water vapor (partial) pressure.
Given total pressure and water vapor mixing ratio, calculates the partial pressure of water vapor.
Parameters: - pressure (pint.Quantity) – total atmospheric pressure
- mixing (pint.Quantity) – dimensionless mass mixing ratio
Returns: pint.Quantity – The ambient water vapor (partial) pressure in the same units as pressure.
Notes
This function is a straightforward implementation of the equation given in many places, such as [Hobbs1977] pg.71:
\[e = p \frac{r}{r + \epsilon}\]See also