ra: Aerodynamic resistance

Description Usage Arguments Value

Description

Calculation of the aerodynamic resistance for a given crop surface. Defaults to the FAO grass reference surface.

Usage

1
ra(wz = 2, zrm = NULL, zrh = NULL, d, h = 0.12, zw = 2, zh = 2)

Arguments

wz

wind speed at height zw (default 2m/s)

zrm

roughness length governing momentum transfer in m (default 0.123*h)

zrh

roughness length governing heat transfer in m (default 0.1*zrm)

d

zero plane displacement height (default 2/3*h)

h

crop height in m (defaults to 0.12m).

zw

height of wind measurements in m (default 2m).

zh

height of humidity measurements in m (default 2m).

lai

Leaf area index

Value

ra returns the aerodynamic resistance


achtmalklug/Retp documentation built on June 7, 2019, 12:47 a.m.