Estimate indirect N2O from volatilised ammonia.

Converts the ammonia-N already volatilised (calculate_nh3()'s nh3_n_t) into indirect nitrous oxide. "ipcc2019" (the default) is the IPCC 2019 Tier 1 wet/dry EF4, read from ipcc_2019_soil_n_ef on each row's moisture_regime: 0.014 wet and 0.005 dry (IPCC 2019 Refinement Vol 4 Ch 11 Table 11.3 (Updated) p. 11.26), stamped "ipcc2019_wet_dry". "ipcc2019_atl_med" is the Atlantic/Mediterranean option: Atlantic rows use the flat EF4 wet factor (ef4_nh3_to_n2o_atl, 0.014) and touch no emission-factor lookup; Mediterranean rows use the disaggregated n2o_efs_disaggregated ef on (irrig_type, climate) alone (NH3_MgN * N2O_EF), WITHOUT the fertiliser_n2o_modifiers mf that calculate_soil_n2o()'s method = "aguilera" applies to direct N2O. It is stamped "ipcc2019_atl_med".

Usage

calculate_indirect_n2o_nh3(
  x,
  method = c("ipcc2019", "ipcc2019_atl_med"),
  example = FALSE
)

Source

IPCC (2019) 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Vol 4, Ch 11, Table 11.3 (Updated), p. 11.26.

Arguments

x

A tibble with nh3_n_t. method = "ipcc2019" requires moisture_regime ("wet" or "dry"); method = "ipcc2019_atl_med" requires climate and, for MED rows, the irrig_type column n2o_efs_disaggregated is keyed on.

method

"ipcc2019" (default, IPCC 2019 Tier 1 wet/dry) or "ipcc2019_atl_med" (ATL flat EF4, MED disaggregated by irrigation).

example

If TRUE, return a small fixture instead of computing from x. Defaults to FALSE.

Value

x with n2o_indirect_nh3_n_t and method_n2o_indirect_nh3 appended.

Details

method = "ipcc2019" aborts on an absent, missing or invalid moisture_regime exactly as calculate_soil_n2o() does.

Examples

calculate_indirect_n2o_nh3(example = TRUE)
#> # A tibble: 2 × 4
#>   nh3_n_t moisture_regime n2o_indirect_nh3_n_t method_n2o_indirect_nh3
#>     <dbl> <chr>                          <dbl> <chr>                  
#> 1     1.1 wet                           0.0154 ipcc2019_wet_dry       
#> 2     1.1 dry                           0.0055 ipcc2019_wet_dry