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footprintDemand

Source: R/footprintDemand.R
footprintDemand.Rd

Per-tonne denominator for consumption-based (embodied) resource footprints: the tonnes of the FINAL product consumed in each prim/secd/feed pathway. Used by footprints (type = "perTonne") and reportFootprints to turn an absolute footprint into a per-tonne intensity that is comparable across resources.

  • prim = primary products eaten directly (all demand categories except the processed and feed categories);

  • secd = tonnes of SECONDARY (ksd) products consumed (the processing OUTPUT, not the primary input); with secdToFeed = TRUE the fed-secondary share is excluded so it reads per tonne of secondary eaten as food/non-feed;

  • feed = tonnes of LIVESTOCK (kli) products consumed.

Usage

footprintDemand(dem, prods, kli, ksd, secdToFeed = TRUE)

Arguments

dem

demand object (region, year, demand.product) as returned by demand(gdx, level), with the dom_balanceflow category already removed.

prods

products present in the footprint (used to restrict the primary set); typically getItems(<footprint>, dim = "product").

kli

livestock product set (readGDX(gdx, "kli")).

ksd

secondary (processed) product set (readGDX(gdx, "ksd")).

secdToFeed

logical; if TRUE (default) drop the fed share of secondary products from the secd denominator so it reads per tonne of secondary eaten as food. Should match the secdToFeed used for the numerator. See embodiedResourceKastner.

Value

MAgPIE object (region, year, pathway) with pathway in {prim, secd, feed}, in tonnes (Mt DM) of the final product consumed.

See also

footprints, reportFootprints

Author

David M Chen

Examples

if (FALSE) { # \dontrun{
  dem   <- demand(gdx, level = "reg")[, , "dom_balanceflow", invert = TRUE]
  denom <- footprintDemand(dem, getItems(dem, dim = 3.2),
                           kli = readGDX(gdx, "kli"), ksd = readGDX(gdx, "ksd"))
} # }