psychrometric.constant: Psychrometric Constant

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

Psychrometric Constant

Description

Calculates the psychrometric 'constant'.

Usage

psychrometric.constant(Tair, pressure, constants = bigleaf.constants())

Arguments

Tair	Air temperature (deg C)
pressure	Atmospheric pressure (kPa)
constants	cp - specific heat of air for constant pressure (J K-1 kg-1) eps - ratio of the molecular weight of water vapor to dry air (-)

Details

The psychrometric constant (γ) is given as:

γ = cp * pressure / (eps * λ)

where λ is the latent heat of vaporization (J kg-1), as calculated from latent.heat.vaporization.

Value

γ - the psychrometric constant (kPa K-1)

References

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

Examples

psychrometric.constant(seq(5,45,5),100)

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