Below are agriculture methane and nitrous oxide mitigation data for EMF 21. This data includes new mitigation estimates for three of the four major sources of non-CO2 gases from the agricultural sector: soil N2O, enteric CH4, and rice CH4. Mitigation estimates for the fourth source, manure CH4, have already been provided along with other methane sectors. The mitigation analysis presents marginal abatement curves (MACs) for the year 2010 only. All values in this analysis are reported as 2000 US Dollars.
For the reference emissions data for these sources, please refer back to the previous Methane and Nitrous Oxide links. Important: The files for Nitrous Oxide emissions have been updated to correct the numbers for ag soil data for China.
Special note: The results of this analysis are still preliminary. This means that it has not been reviewed by sector experts as was done for the other non-CO2 mitigation analyses. The team who worked on this analysis, see below, will submit this work for review at the upcoming Methane and Nitrous Oxide Mitigation Conference in China from Nov 17-19, 2003. A reviewed and updated analysis will then be available in early 2004. However, since this is too late for modelers in EMF 21 who wish to use preliminary or "place holder" data before the last meeting in December, we have made this data available now.
Marginal Abatement
Curves for Agriculture
The ag sector link below contains MACs for 2010 for each region where mitigation options for the following agricultural emissions apply: soil N2O, enteric CH4 and rice CH4. There are six total files in the link below, where units are expressed in carbon equivalent units, as well as N2O and CH4 units.
Files and Naming
Convention for Ag Sector MACs:
Below is a list of the files that should be un-zipped for the agriculture sector.
1) IMAC_AG_SoilTCE.xls Reports N2O reference emissions and MAC data in absolute reductions in million metric tons of carbon equivalent (MMTCE) for agricultural soils using a USD per ton of carbon equivalent ($/TCE) scale.
2) IMAC_AG_SoilN2O.xls Reports N2O reference emissions and MAC data in absolute reductions in Gg of N2O for agricultural soils using a USD per ton N2O ($/TN2O) scale.
3) IMAC_AG_EntTCE.xls Reports CH4 reference emissions and MAC data in absolute reductions in million metric tons of carbon equivalent (MMTCE) for enteric CH4 using a USD per ton of carbon equivalent ($/TCE) scale.
4) IMAC_AG_EntCH4.xls Reports CH4 reference emissions and MAC data in absolute reductions in Gg of CH4 for enteric CH4 using a USD per ton CH4 ($/TCH4) scale.
5) IMAC_AG_RiceTCE.xls Reports CH4 reference emissions and MAC data in absolute reductions in million metric tons of carbon equivalent (MMTCE) for rice using a USD per ton of carbon equivalent ($/TCE) scale.
6) IMAC_AG_RiceCH4.xls Reports CH4 reference emissions and MAC data in absolute reductions in Gg of CH4 for rice using a USD per ton of CH4 ($/TCH4) scale.
Note that N2O and CH4 are converted to carbon equivalent units by first multiplying these emissions by their respective 100-year GWPs from IPCC SAR (GWP for CH4 =21; GWP for N2O =310) to give CO2-equivalent units, which are then divided by 3.667 to give C-equivalent units.
Contents of Each
Spreadsheet:
Each spreadsheet represents a specific agricultural emission source: soil N2O, enteric CH4 or rice CH4.
All MACs are represented in absolute terms. The data are reported in either $/TCE or $/TN2O and $/TCH4 (all in 2000 USD).
All MACs use a 5% discount rate. Sensitivity analyses for different discount rates have not been conducted.
Where there are no data for a country or region, the authors of the mitigation analysis considered those mitigation options to be inappropriate in that country or region.
Technology tables for the agriculture N2O and CH4 mitigation options will be posted at a later date.
Please read the following methodology memo for further information.
For Questions on the overall study, contact: Francisco de la Chesnaye, Phone: 202-564-0172; email: delachesnaye.francisco@epa.gov
For Questions on the agriculture mitigation analysis, contact: Benjamin DeAngelo, Phone: 202-564-9107; Email: deangelo.ben@epa.gov
The team who worked on the agriculture mitigation analysis: Benjamin DeAngelo, Francisco de la Chesnaye, (USEPA), and Robert Beach, Allan Sommer, Brian Murray and Brooks Depro (RTI International). Special thanks to Don Johnson (Colorado Sate Unv) and Ann Gardner (AEA Technology) for providing much of the detailed input data for the analysis.