pyet.radiation.oudin

pyet.radiation.oudin(tmean, lat, k1=100, k2=5, clip_zero=True)

Potential evapotranspiration calculated according to Oudin et al. (2005).

Parameters:

• tmean (pandas.Series or xarray.DataArray) – average day temperature [°C].

• lat (float or xarray.DataArray) – the site latitude [rad].

• k1 (float, optional) – calibration coefficient [-].

• k2 (float, optional) – calibration coefficient [-].

• clip_zero (bool, optional) – if True, replace all negative values with 0.

Returns:

• pandas.Series or xarray.DataArray containing the calculated potential

• evapotranspiration [mm d-1].

• clip_zero (bool, optional) – if True, replace all negative values with 0.

Examples

>>> pet_oudin = oudin(tmean, lat)

Notes

Based on equation 3 in Oudin et al. (2005).

\[PET = \frac{R_a (T_{mean} +5)}{\lambda 100}; if T_{mean}+5>0 else: PET = 0\]