varwg.meteo.meteox2y.slope_sat_p

varwg.meteo.meteox2y.slope_sat_p(at)

slope of the saturation vapor pressure function, depends only on air temperature

Parameters:

atfloat or numpy.array of floats

(mean daily) air temperature [deg C]

Returns:

slopefloat or numpy.array of floats

slope of the saturation vapor pressure function [kPa/deg C]

Notes

A polynomial is used to evaluate the slope and is only valid for -5 < ‘at’ > 45 [deg C].

References

[1]

Campbell Scientific (1995) application note 4-D: On-Line Estimation of Grass Reference Evapotranspiration with the Campbell Scientific Automated Weather Station