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Agricultural, Nature chapters

Agricultural, Nature chapters. Manure management (4B) Soils (4D) Field burning of agricultural wastes (4F) Other (4G) Nature (11). General. Much time spent on harmonisation with IPCC + new format Much time spent in technical editing Not much time spent on improving the science

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Agricultural, Nature chapters

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  1. Agricultural, Nature chapters Manure management (4B) Soils (4D) Field burning of agricultural wastes (4F) Other (4G) Nature (11) U N I V E R S I T Y O F A A R H U S Faculty of Agricultural Sciences

  2. General • Much time spent on harmonisation with IPCC + new format • Much time spent in technical editing • Not much time spent on improving the science • Some errors and omissions • Appendices need tidying

  3. Manure management (4B) • NH3, NO, NMVOC, PM • NMVOC and PM • Some updating of EFs • Large uncertainties remain • For N species • Harmonisation with IPCC 2006 • N flow and ammonium (TAN) based • New Tier 2 for NO

  4. NH3, NO – Tier 2 • IPCC N2O emission • Methodology is detailed • Emissions are function of animal N excretion • Only considers emissions from storage • Include animal housing • Strategic decisions • N flow methodology • Distinguish between total and ammoniacal N (TAN) • Slurry and farmyard manure (FYM)

  5. Cost/benefit of approaches • Benefits of N flow approach • Interactions between sources are included • Helps detect errors in calculation • Benefits of TAN approach • NH3 and NO occur from TAN • TAN is a better predictor of emission • Benefit of slurry & FYM • Clarity • Costs of approach • Increase in complexity relative to IPCC • Small increase in number of parameters

  6. Omissions and corrections • 4B • Arrow from storage to field in Fig 2-1 • Create separate Tier 2 for PM • 4B – NH3 Tier 2 • Table of default additions of straw • Errors in equations 30 & 31 • Delete equation 33 • Table 3-4: delete NH3 column and move to section 3.3.3

  7. Soils - 4D • Need Tier 1 for all pollutants: • Consistency with IPCC • Needed for Key Source analysis • Tier 1 simpler than old Simpler methodology • Will be a Key source for all countries • Tier 1 will rarely be used • Default emission factor revised after review of first draft

  8. Soils (4D) • NH3 Tier 2 • Essentially same as Detailed methodology • Source of equations – old data + expert judgement • Separating of arable/grassland abandoned • Crop emissions • Partially incorporated in emission factors for fertiliser (as before)

  9. Errors and omissions • 4D • Check PM EFs in appendix

  10. Field burning – 4F • Overview is incorrect • Confusion with small-scale waste-burning (6Ce) • Some updating of EFs

  11. Nature - 11

  12. Actions needed: • Implement information availale from NatAir • Include all relevant sources from nature already included in the old guide book Nature - 11 • Only 2 sources included in the second order draft (volcanos, forest fires) • New information not included

  13. Future • Correct errors and omission • Formally accept Guidebook • Tier 2 for NO • Review NH3 emissions from fertilisers • Lex Bouman • UK study • Others? • Spatial disaggregation • NH3 - temporal disaggregation

  14. Task Force on Reactive Nitrogen • Link with Ag and Nature • Expert Panel on N balances • Expert Panel on N mitigation • Joint meetings with EP on N mitigation? • http://www.clrtap-tfrn.org/

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