Convert IPCC per-animal livestock emissions from kilograms to kilotonnes.

Bridge the two unit families the package carries. The IPCC calculators (calculate_livestock_emissions() and friends) emit kilograms of gas in enteric_ch4_tier1/enteric_ch4_tier2, manure_ch4_tier1/ manure_ch4_tier2 and manure_n2o_total. The FAOSTAT-shaped gridded and national artifacts carry kilotonnes in enteric_ch4_kt, manure_ch4_kt and manure_n2o_kt. Nothing converted between them, so the two families never met; this is the one place that conversion happens.

The factor is exact: 1 kilotonne is 1e6 kilograms.

Usage

livestock_emissions_to_kt(data, tier = 2)

Arguments

data

A tibble from the IPCC livestock calculators, carrying the kilogram columns for the requested tier. A missing column aborts rather than being treated as zero.

tier

IPCC tier the kilogram columns come from, 2 (default) or 1.

Value

data with enteric_ch4_kt, manure_ch4_kt and manure_n2o_kt added.

Examples

tibble::tibble(
  enteric_ch4_tier1 = 8e7,
  manure_ch4_tier1 = 1e7,
  manure_n2o_total = 5e5
) |>
  livestock_emissions_to_kt(tier = 1)
#> # A tibble: 1 × 6
#>   enteric_ch4_tier1 manure_ch4_tier1 manure_n2o_total enteric_ch4_kt
#>               <dbl>            <dbl>            <dbl>          <dbl>
#> 1          80000000         10000000           500000             80
#> # ℹ 2 more variables: manure_ch4_kt <dbl>, manure_n2o_kt <dbl>