roughlength: Calculate roughness length governing momentum transfer
In ilyamaclean/microctools: Various worker functions for microclimc package

roughlength

R Documentation

Calculate roughness length governing momentum transfer

Description

Calculate roughness length governing momentum transfer

Usage

roughlength(
  hgt,
  PAI,
  zm0 = 0.003,
  cdl = 7.5,
  CR = 0.3,
  psih = 0.193,
  umx = 0.3
)

Arguments

`hgt`	canopy height (m)
`PAI`	Plant area index
`zm0`	substrate-surface drag coefficient
`cdl`	Control parameter scaling d/h (from Raupach 1994)
`CR`	roughness-element drag coefficient
`psih`	parameter characterizes the roughness sublayer depth
`umx`	Maximum ratio of wind velocity to friction velocity

Value

momentum roughness length (m)

References

Raupach, M.R. (1994) Simplified expressions for vegetation roughness length and zero-plane displacement as functions of canopy height and area index. Boundary-Layer Meteorology 71: 211-216.

ilyamaclean/microctools documentation built on Jan. 25, 2023, 5:29 a.m.