agricultural, nature chapters
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
U N I V E R S I T Y O F A A R H U S
Faculty of Agricultural Sciences
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 Some errors and omissions Appendices need tidying
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
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)
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
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
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
Soils - 4D
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)
Errors and omissions
4D Check PM EFs in appendix
Field burning – 4F
Overview is incorrect Confusion with small-scale waste-burning (6Ce)
Some updating of EFs
Nature - 11
Sources Pollutants
Vegetation, esp. Forests NMVOC
Biomass burning and forest fires NOx, PM, CO, CO2, CH4, OC, EC, VOC
NO from soils NO
Pollen PM
Wild animals CH4, NH3
Anoxic soil processes (wetlands) CH4
Natural seepage of gas storage CH4, NMVOC
Wind blown dust (incl. Saharan) PM
Volcanoes SOx, NOx, PM, HF, HCl, HNO3
Lightning NOx
Sea, Coastal zones PM, DMS
Nature - 11
Only 2 sources included in the second order draft (volcanos, forest fires) New information not included
Actions needed: Implement information availale from NatAir Include all relevant sources from nature
already included in the old guide book
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
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/