cantransdir: Calculates direct beam radiation transmission through...

In ilyamaclean/microctools: Various worker functions for microclimc package

Calculates direct beam radiation transmission through vegetated canopies

Description

Calculates direct beam radiation transmission through vegetated canopies

Usage

cantransdir(l, x, sa, ref = 0.5, clump = 0)

Arguments

l	leaf area index (total one-sided leaf area per unit ground area)
x	leaf distribution angle coefficient
sa	solar altitude in decimal degrees as returned by solalt().
ref	average reflectivity of leaves, usually in shortwave spectrum.
clump	clumpiness factor (0-1, see details)

Details

if clump = 0 the canopy is assumed entirely uniform and radiation transmission is as for a turbid medium. As clump approaches 1, the canopy is assumed to be increasingly patchy, such that a greater proportion of reaches the ground without being obscured by leaves.

Value

the proportion of direct beam radiation transmitted through the canopy

See Also

cansw() to calculate total shortwave radiation underneath canopies

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