earthkit.meteo.thermo.xarray.relative_humidity_from_specific_humidity

earthkit.meteo.thermo.xarray.relative_humidity_from_specific_humidity(t, q, p)

Compute the relative humidity from specific humidity.

Parameters:

• t (xarray.DataArray) – Temperature (K)

• q (xarray.DataArray) – Specific humidity (kg/kg)

• p (xarray.DataArray) – Pressure (Pa)

Returns:

Relative humidity (%)

Return type:

xarray.DataArray

The computation is based on the following formula:

\[r = 100 \frac {e(q, p)}{e_{msat}(t)}\]

where:

• \(e\) is the vapour pressure (see vapour_pressure_from_specific_humidity())

• \(e_{msat}\) is the saturation_vapour_pressure() based on the “mixed” phase