bigleaf (version 0.7.0)

Monin.Obukhov.length: Monin-Obukhov Length

Description

calculates the Monin-Obukhov length.

Usage

Monin.Obukhov.length(data, Tair = "Tair", pressure = "pressure",
  ustar = "ustar", H = "H", constants = bigleaf.constants())

Arguments

data

Data.frame or matrix containing all required variables

Tair

Air temperature (deg C)

pressure

Atmospheric pressure (kPa)

ustar

Friction velocity (m s-1)

H

Sensible heat flux (W m-2)

constants

Kelvin - conversion degree Celsius to Kelvin cp - specific heat of air for constant pressure (J K-1 kg-1) k - von Karman constant (-) g - gravitational acceleration (m s-2)

Value

L -

Monin-Obukhov length (m)

Details

The Monin-Obukhov length (L) is given by:

$$L = - (\rho * cp * ustar^3 * Tair) / (k * g * H)$$

where \(rho\) is air density (kg m-3).

References

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

See Also

stability.parameter

Examples

# NOT RUN {
Monin.Obukhov.length(Tair=25,pressure=100,ustar=seq(0.2,1,0.1),H=seq(40,200,20))

# }