earthkit.meteo.thermo.xarray.mixing_ratio_from_vapour_pressure¶
- earthkit.meteo.thermo.xarray.mixing_ratio_from_vapour_pressure(e, p, eps=0.0001)¶
Compute the mixing ratio from vapour pressure.
- Parameters:
e (
xarray.DataArray) – Vapour pressure (Pa)p (
xarray.DataArray) – Pressure (Pa)eps (
number) – Where p - e <epsnan is returned.
- Returns:
Mixing ratio (kg/kg).
- Return type:
xarray.DataArray
The computation is based on the following formula:
\[w = \frac{\epsilon e}{p - e}\]with \(\epsilon = R_{d}/R_{v}\) (see
earthkit.meteo.constants.epsilon).