dewpoint

metpy.calc.dewpoint(vapor_pressure)

Calculate the ambient dewpoint given the vapor pressure.

Parameters

vapor_pressure (pint.Quantity) – Water vapor partial pressure

Returns

pint.Quantity – Dewpoint temperature

See also

dewpoint_from_relative_humidity, saturation_vapor_pressure, vapor_pressure

Notes

This function inverts the [Bolton1980] formula for saturation vapor pressure to instead calculate the temperature. This yields the following formula for dewpoint in degrees Celsius, where \(e\) is the ambient vapor pressure in millibars:

\[T = \frac{243.5 \log(e / 6.112)}{17.67 - \log(e / 6.112)}\]

Changed in version 1.0: Renamed e parameter to vapor_pressure

Examples using metpy.calc.dewpoint

Dewpoint and Mixing Ratio

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thickness_hydrostatic

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dewpoint_from_relative_humidity