wrf.wetbulb

wrf.wetbulb(pres, tkel, qv, meta=True, units='K')

Return the wetbulb temperature.

This is the raw computational algorithm and does not extract any variables from WRF output files. Use wrf.getvar() to both extract and compute diagnostic variables.

Parameters:

  • pres (xarray.DataArray or numpy.ndarray) –

    Full pressure (perturbation + base state pressure) in [Pa], with the rightmost dimensions as bottom_top x south_north x west_east

    Note

    This variable must be supplied as a xarray.DataArray in order to copy the dimension names to the output. Otherwise, default names will be used.

  • tkel (xarray.DataArray or numpy.ndarray) – Temperature in [K] with same dimensionality as pres.

  • qv (xarray.DataArray or numpy.ndarray) – Water vapor mixing ratio in [kg/kg] with the same dimensionality as pres

  • meta (bool) – Set to False to disable metadata and return numpy.ndarray instead of xarray.DataArray. Default is True.

  • units (str) – The desired units. Refer to the getvar() product table for a list of available units for ‘twb’. Default is ‘K’.

Warning

The input arrays must not contain any missing/fill values or numpy.nan values.

Returns:

The wetbulb temperature. If xarray is enabled and the meta parameter is True, then the result will be an xarray.DataArray object. Otherwise, the result will be a numpy.ndarray object with no metadata.

Return type:

xarray.DataArray or numpy.ndarray

See also

wrf.getvar(), wrf.temp(), wrf.eth(), tvirtual()