relative_humidity_wet_psychrometric

metpy.calc.relative_humidity_wet_psychrometric(dry_bulb_temperature, web_bulb_temperature, pressure, **kwargs)[source]

Calculate the relative humidity with wet bulb and dry bulb temperatures.

Parameters:
  • dry_bulb_temperature (pint.Quantity) – Dry bulb temperature
  • web_bulb_temperature (pint.Quantity) – Wet bulb temperature
  • pressure (pint.Quantity) – Total atmospheric pressure
Returns:

pint.Quantity – Relative humidity

Notes

\[RH = 100 \frac{e}{e_s}\]
  • \(RH\) is relative humidity
  • \(e\) is vapor pressure from the wet psychrometric calculation
  • \(e_s\) is the saturation vapor pressure

References

[10]WMO GUIDE TO METEOROLOGICAL INSTRUMENTS AND METHODS OF OBSERVATION WMO-No.8 (2008 edition, Updated in 2010) : PART 4 https://www.wmo.int/pages/prog/www/IMOP/CIMO-Guide.html
[11]Fan, Jinpeng. “Determination of the psychrometer coefficient A of the WMO reference psychrometer by comparison with a standard gravimetric hygrometer.” Journal of Atmospheric and Oceanic Technology 4.1 (1987): 239-244.

See also

psychrometric_vapor_pressure_wet(), saturation_vapor_pressure()