"""Definition of the thetav operator."""
# Third-party
import xarray as xr
from earthkit.meteo import thermo # type: ignore
# Local
from .. import metadata
[docs]
def fthetav(p: xr.DataArray, t: xr.DataArray, qv: xr.DataArray) -> xr.DataArray:
"""Virtual potential temperature in K.
Parameters
----------
p : xarray.DataArray
pressure in Pa
t : xarray.DataArray
air temperature in K
qv : xarray.DataArray
specific humidity (dimensionless)
Returns
-------
xarray.DataArray
virtual potential temperature in K
"""
pb, tb, qvb = xr.broadcast(p, t, qv)
return xr.DataArray(
data=thermo.virtual_potential_temperature(tb.values, qvb.values, pb.values),
dims=pb.dims,
attrs=metadata.override(t.metadata, shortName="THETA_V"),
)