VPD.to.rH: Conversions between Humidity Measures

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

Conversions between Humidity Measures

Description

Conversion between vapor pressure (e), vapor pressure deficit (VPD), specific humidity (q), and relative humidity (rH).

Usage

VPD.to.rH(
  VPD,
  Tair,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

rH.to.VPD(
  rH,
  Tair,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

e.to.rH(
  e,
  Tair,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

VPD.to.e(
  VPD,
  Tair,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

e.to.VPD(
  e,
  Tair,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

e.to.q(e, pressure, constants = bigleaf.constants())

q.to.e(q, pressure, constants = bigleaf.constants())

q.to.VPD(
  q,
  Tair,
  pressure,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

VPD.to.q(
  VPD,
  Tair,
  pressure,
  Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
  constants = bigleaf.constants()
)

Arguments

VPD	Vapor pressure deficit (kPa)
Tair	Air temperature (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	eps - ratio of the molecular weight of water vapor to dry air (-) Pa2kPa - conversion pascal (Pa) to kilopascal (kPa)
rH	Relative humidity (-)
e	Vapor pressure (kPa)
pressure	Atmospheric pressure (kPa)
q	Specific humidity (kg kg-1)

References

Foken, T, 2008: Micrometeorology. Springer, Berlin, Germany.

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