earthkit.meteo.thermo.relative_humidity_from_dewpoint

earthkit.meteo.thermo.relative_humidity_from_dewpoint(t: ArrayLike, td: ArrayLike) → ArrayLike

earthkit.meteo.thermo.relative_humidity_from_dewpoint(t: xarray.DataArray, td: xarray.DataArray) → xarray.DataArray

earthkit.meteo.thermo.relative_humidity_from_dewpoint(t: earthkit.data.FieldList, td: earthkit.data.FieldList) → earthkit.data.FieldList

Compute the relative humidity from dewpoint temperature.

Parameters:

• t (array-like) – Temperature (K)

• td (array-like) – Dewpoint (K)

Returns:

Relative humidity (%)

Return type:

array-like

The computation is based on the following formula:

\[r = 100 \frac {e_{wsat}(td)}{e_{wsat}(t)}\]

where \(e_{wsat}\) is the saturation_vapour_pressure() over water.

Implementations

relative_humidity_from_dewpoint() calls one of the following implementations depending on the type of the input arguments:

• earthkit.meteo.thermo.array.relative_humidity_from_dewpoint() for array-like

• earthkit.meteo.thermo.xarray.relative_humidity_from_dewpoint() for xarray.DataArray

• earthkit.meteo.thermo.fieldlist.relative_humidity_from_dewpoint() for FieldList

The function returns an object of the same type as the input arguments.