del13c: Calculate the del13C for a given Plant Functional Type.

In griffithdan/grassmap: Stable Terrestrial Carbon Isoscape Package

Description

This function applies a carbon isotope endmember to a given plant plant functional type and calculates the per-pixel contribution of the plant functional type for the given extent, resulting in a layer of the relative contribution of the endmember, used an an input for calc_cisoscape function.

Usage

del13c(total_veg, PFTlayer, endmember, filename = '', ...)

Arguments

total_veg	RasterLayer. Per-pixel percentage of total vegetation cover present.
PFTlayer	RasterLayer. Per-pixel percentage of plant functional type. Output of partitionNatHerb function, or percent tree/woody cover.
endmember	numeric. Value to be used as a del13C endmember for the plant functional type.
filename	Character. Output filename (optional)
...	additional arguments for writing files as in writeRaster

Value

RasterLayer

Author(s)

Sydney M Firmin

References

Powell, R.L., Yoo, E-H., & Still, C.J. (2012) Vegetation and soil carbon-13 isoscapes for South America: integrating remote sensing and ecosystem isotope measurements. Ecosphere, 3, 109, doi: 10.1980/ES12-00162.1.

Examples

##C3endmember <- del13c(total_veg = total, c3.all, -26.7)
##C3endmember_sd <- del13c(total_veg = total, c3.all, 2.3)

griffithdan/grassmap documentation built on May 17, 2019, 8:37 a.m.