Scale PPR index by total primary production — calc_ppr

Total primary production (PP) should be in units mtC year^-1, since PPR has units mtC year^-1. The ratio of PPR:PP is then returned

calc_ppr_scaled(
  PPR,
  PP,
  pprField = "INDEX",
  yearFieldPPR = "YEAR",
  ppField = "ANNUAL_MTON",
  yearFieldPP = "YEAR"
)

Arguments

PPR: Data frame (n x 2). Primary production required index over time. Two columns YEAR and INDEX
PP: List. First element labeled PP is a Data frame of size (n x 2). Columns YEAR, ANNUAL_MEAN. Second element labeled EPUarea is the area of the region
pprField: Character string. The name of the field in PPR which contains the PPR index data.
yearFieldPPR: Character string. The name of the field in PPR which contains the Year.
ppField: Character string. The name of the field in PP which contains the PP data.
yearFieldPP: Character string. The name of the field in PP which contains the Year.

Data frame (n x 7)

Units: Percentage