lai_adjust: Calculates Leaf Area Index for specified height above ground

In ilyamaclean/microclima: microclimate modelling with R

Calculates Leaf Area Index for specified height above ground

Description

lai_adjust is used to adjust the total one-sided area of leaf tissue per unit ground surface area to derive values at at a specified height above the ground.

Usage

lai_adjust(l, veghgt, hgt = 0.05)

Arguments

l	SpatRaster object, two-dimensional array or matrix of leaf area index values as returned by lai().
veghgt	a SpatRaster object, two-dimensional array or matrix of vegetation heights (m).
hgt	a numeric value representing the height above the ground for which Leaf Area Index is required (m).

Details

If l is a SpatRaster object, a SpatRaster object is returned. Temperatures are often required for a specified height above the ground, and in short vegetation, the leaf area can be substantially less at this height than at ground level. This function enables the user to estimate leaf area for a specified height about the ground.

Value

a SpatRaster object or a two-dimensional area of numeric values representing the Leaf Area Index values for a specified height above the ground

Examples

library(terra)
l <- lai(aerial_image[,,3], aerial_image[,,4])
la<-lai_adjust(l, rast(veg_hgt))
par(mfrow=c(2, 1))
plot(if_raster(l, dtm1m), main = "Leaf area index")
plot(if_raster(la, dtm1m), main = "Adjusted leaf area index")

ilyamaclean/microclima documentation built on Sept. 5, 2024, 8:37 p.m.