wrf.omega

wrf.omega(qv, tkel, w, pres, meta=True)

Return omega.

This function calculates omega (dp/dt) [Pa s-1].

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:

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

  Water vapor mixing ratio in [kg/kg] 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 the same dimensionality as qv.

• w (xarray.DataArray or numpy.ndarray) – The vertical velocity [m s-1] with the same dimensionality as qv.

• pres (xarray.DataArray or numpy.ndarray) – Full pressure (perturbation + base state pressure) in [Pa] with the same dimensionality as qv.

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

Warning

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

Returns:

Omega. 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(), uvmet()