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Indirect N2O emission factors.

Source: R/livestock_coefs.R
indirect_n2o_ef.Rd

Parameters for indirect N2O emissions from manure management: EF4 (volatilization), EF5 (leaching), FracGasMS, FracLeach, one block per IPCC edition. The manure engine reads the block its indirect_n2o_source option names (see apply_management_losses()); the default is "ipcc_2019".

Verified against both editions of Vol 4, Ch 11, Table 11.3 (whep#1245):

  • ef4_volatilization 0.010 in both (aggregated value).

  • ef5_leaching 0.011 in the 2019 Refinement, 0.0075 in the 2006 Guidelines.

  • frac_leach is FracLEACH-(H): 0.24 in the 2019 Refinement, 0.30 in the 2006 Guidelines. Both editions apply it only where leaching occurs (wet climates in 2019; where the soil water-holding capacity is exceeded in 2006) and take it as zero elsewhere; WHEP applies it everywhere.

Until whep#1245 the table cited 2019 while holding the 2006 EF5 and FracLEACH-(H).

  • frac_gasm is FracGASM, the volatilised fraction of organic N applied and of dung and urine deposited by grazing animals: 0.21 in the 2019 Refinement, 0.20 in the 2006 Guidelines (whep#1365). The default per-MMS indirect manure N2O prices pasture N at it.

frac_gasms 0.20 is the same in both blocks and is assumed, unverified: Table 10.22 of either edition publishes FracGasMS per animal category and manure system, not one number, and 0.20 equals the 2006 FracGASM of Table 11.3 (the 2019 FracGASM is 0.21). Since whep#1365 only the indirect_n2o_fractions = "single" form reads it; the default reads the per-system Table 10.22 values instead.

Usage

indirect_n2o_ef

Format

A tibble with edition ("ipcc_2019" or "ipcc_2006"), parameter, value, description.

Source

IPCC 2019 Refinement, Vol 4, Ch 11, Table 11.3 (Updated), p. 11.26; IPCC 2006 Guidelines, Vol 4, Ch 11, Table 11.3, p. 11.24; Vol 4, Ch 10, Table 10.22 of either edition for FracGasMS.

Examples

indirect_n2o_ef
#> # A tibble: 10 × 4
#>    edition   parameter           value description                              
#>    <chr>     <chr>               <dbl> <chr>                                    
#>  1 ipcc_2019 ef4_volatilization 0.01   EF4: N2O-N per kg NH3-N + NOx-N volatili…
#>  2 ipcc_2019 ef5_leaching       0.011  EF5: N2O-N per kg N leached/runoff       
#>  3 ipcc_2019 frac_gasms         0.2    FracGasMS: fraction N lost as NH3+NOx fr…
#>  4 ipcc_2019 frac_leach         0.24   FracLeach: fraction N lost via leaching/…
#>  5 ipcc_2019 frac_gasm          0.21   FracGASM: fraction of grazing-deposited …
#>  6 ipcc_2006 ef4_volatilization 0.01   EF4: N2O-N per kg NH3-N + NOx-N volatili…
#>  7 ipcc_2006 ef5_leaching       0.0075 EF5: N2O-N per kg N leached/runoff       
#>  8 ipcc_2006 frac_gasms         0.2    FracGasMS: fraction N lost as NH3+NOx fr…
#>  9 ipcc_2006 frac_leach         0.3    FracLeach: fraction N lost via leaching/…
#> 10 ipcc_2006 frac_gasm          0.2    FracGASM: fraction of grazing-deposited …