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/