dew.point: Dew Point

In bigleaf: Physical and Physiological Ecosystem Properties from Eddy Covariance Data

Dew Point

Description

calculates the dew point, the temperature to which air must be cooled to become saturated (i.e. e = Esat(Td))

Usage

dew.point(
  Tair,
  VPD,
  accuracy = 0.001,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

Arguments

Tair	Air temperature (degC)
VPD	Vapor pressure deficit (kPa)
accuracy	Accuracy of the result (deg C)
Esat.formula	Optional: formula to be used for the calculation of esat and the slope of esat. One of "Sonntag_1990" (Default), "Alduchov_1996", or "Allen_1998". See Esat.slope.
constants	Pa2kPa - conversion pascal (Pa) to kilopascal (kPa)

Details

Dew point temperature (Td) is defined by:

e = Esat(Td)

where e is vapor pressure of the air and Esat is the vapor pressure deficit. This equation is solved for Td using optimize.

Value

Td -	dew point temperature (degC)

References

Monteith J.L., Unsworth M.H., 2008: Principles of Environmental Physics. 3rd edition. Academic Press, London.

Examples

dew.point(c(25,30),1.5)                

bigleaf documentation built on Aug. 22, 2022, 9:09 a.m.