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calcYieldsCalibrated

Source: R/calcYieldsCalibrated.R
calcYieldsCalibrated.Rd

This functions calibrates extracted yields from LPJmL to FAO country level yields

Usage

calcYieldsCalibrated(
  source = c(lpjml = "ggcmi_phase3_nchecks_9ca735cb", isimip = NULL),
  climatetype = "GSWP3-W5E5:historical",
  refYear = "y1995",
  selectyears = seq(1965, 2100, by = 5),
  cells = "lpjcell",
  multicropping = FALSE,
  refYields = FALSE,
  areaSource = "FAO",
  marginal_land = "magpie"
)

Arguments

source

Defines LPJmL version for main crop inputs and isimip replacement. For isimip choose crop model/gcm/rcp/co2 combination formatted like this: "yields:EPIC-IIASA:ukesm1-0-ll:ssp585:default:3b"

climatetype

switch between different climate scenarios

refYear

reference year for calibration

selectyears

Years to be returned (for memory reasons)

cells

number of cells "magpiecell" for 59199 cells or "lpjcell" for 67420 cells

multicropping

Multicropping activated (TRUE) or not (FALSE) and Multiple Cropping Suitability mask selected (mask can be: "none": no mask applied (only for development purposes) "actual:total": currently multicropped areas calculated from total harvested areas and total physical areas per cell from readLanduseLandInG "actual:crop" (crop-specific), "actual:irrigation" (irrigation-specific), "actual:irrig_crop" (crop- and irrigation-specific), "potential:endogenous": potentially multicropped areas given temperature and productivity limits "potential:exogenous": potentially multicropped areas given GAEZ suitability classification) (e.g. TRUE:actual:total; TRUE:none; FALSE)

refYields

assumption for baseline yields with respect to multiple cropping (e.g., FALSE: single-cropped LPJmL yields used as baseline to calculate country-level yields, "TRUE:actual:irrig_crop": multicropped yields where LandInG reports current multiple cropping (irrigation- and crop-specific))

areaSource

data source for croparea used in calculation: FAO or LandInG Note: when calibrating multicropped yields, LandInG croparea should be used

marginal_land

Defines which share of marginal land should be included (see options below) and whether suitable land under irrigated conditions ("irrigated"), under rainfed conditions ("rainfed") or suitability under rainfed conditions including currently irrigated land (rainfed_and_irrigated) should be used. Options combined via ":" The different marginal land options are:

  • "all_marginal": All marginal land (suitability index between 0-0.33) is included as suitable

  • "q33_marginal": The bottom tertile (suitability index below 0.13) of the marginal land area is excluded.

  • "q50_marginal": The bottom half (suitability index below 0.18) of the marginal land area is excluded.

  • "q66_marginal": The first and second tertile (suitability index below 0.23) of the marginal land area are excluded.

  • "q75_marginal": The first, second and third quartiles (suitability index below 0.25) of the marginal land are are excluded

  • "no_marginal": Areas with a suitability index of 0.33 and lower are excluded.

  • "magpie": Returns "all_marginal:rainfed_and_irrigated", "q33_marginal:rainfed_and_irrigated" and "no_marginal:rainfed_and_irrigated" in a magclass object to be used as magpie input.

Value

magpie object in cellular resolution from reference year onwards

Author

Kristine Karstens, Felicitas Beier

Examples

if (FALSE) { # \dontrun{
calcOutput("YieldsCalibrated", aggregate = FALSE)
} # }