pyet.radiation.makkink_knmi#

pyet.radiation.makkink_knmi(tmean, rs, clip_zero=True)[source]#

Potential evapotranspiration calculated according to The Royal Netherlands Meteorological Institute (KNMI)

Parameters:

tmean (pandas.Series or xarray.DataArray) – average day temperature [°C].
rs (pandas.Series or xarray.DataArray) – incoming solar radiation [MJ m-2 d-1].
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].

Examples

>>> pet_mak = makkink_knmi(tmean, rs)

Notes

This method is only applicable to the Netherlands (~sea level) due to some emperical values. Calculating the Makkink evaporation with the original formula is more suitable for general purposes. To obtain the same value as EV24 round the value up to one decimal.