Post on 06-Apr-2015
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Joint EPMAN and TFEIP Expert Panel meetingBerlin, September 28, 2012
EAGER Network
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
EAGER: European Agricultural Gaseous Emissions Inventory Researchers Network
Background• Accurate and reliable inventories of NH3 emissions are
increasingly important• In the past different national inventories were not comparable due
to different methods used• A core group of emission inventory experts initiated EAGER to
– achieve a detailed overview of present best available inventory techniques– initiate a new generation of emission inventories
• Network founded in 2003; 1-2 workshops per year
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
EAGER: European Agricultural Gaseous Emissions Inventory Researchers Network
Key tasks
• Comparison of models: how far do results agree; reasons for differences?
– Liquid manure system dairy cows, fattening pigs (paper)
– Solid manure systems beef cattle, broilers (paper)
• Review of published and unpublished data on emission factors for NH3, N2O and CH4 for solid manure (paper)
• Analysis of NH3 emissions per unit product (milk, beef, pork,
broiler, eggs) in different countries (ongoing)
• Exchange on ongoing and new activities
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Approach for comparison of models• Six N-flow models from DE, DK, NL, UK, CH used for
emission inventories• Mass flow approach with animal specific
excretion rates• N/TAN flow of through different stages of
the manure handling chain is simulated• Emissions are calculated with emission
factors expresses in percentage of the TAN present a specific stage of emission
• Effects of emissions that occur in the upstream part of the manure management system on emissions on the subsequent downstream parts can be easily taken into account
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Approach for comparison of models (2)
• Liquid manure system: A simplified dairy cow and pig scenario (only dairy scenario presented here)
• Solid manure system: Beef cattle and broiler scenarios
Scenario Nitrogen excretion [kg yr-1 N]
Emission factors
FF Fixeda Fixeda
FN Fixeda Nationalb
NN Nationalb Nationalb a) Same value used in all models b) Model-specific values used
• Three levels of model standardizations
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Results and discussion: FF scenario liquid
• Very similar estimates of the NH3 emissions for the FF scenario underlying N flows of the different models are
highly comparablekg
NH
3-N
yr-1
500
1000
1500
2000
2500
3000GrazingHousingStorageApplication
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Results and discussion: FN scenario liquid• Substantial differences in emissions due to assumptions
used for emission factors (EF), e.g.:- Lowest N-fertilization of pastures for DYNAMO- Solid floor housing systems in UK- DYNAMO assumes constant
emissions per m2 during partial grazing
- Broadcast application banned in NL EF notup to date
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
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Results and discussion: NN scenario liquid
• More substantial differences between results than FN scenario• Variation primarily result from distinct national emission
factors and N excretion rates which reflect the specific livestock and manure management systems and climatic conditions
• Similar conclusions for pig scenario
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Results solid manure scenarios (Beef cattle)
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FF FN NN
• Much larger variability than for slurry scenarios- Limited data available; big gaps and uncertainties in knowledge
for important processes influencing the ammonia losses- Immobilization and mineralization processes more important- Larger differences in production systems between the different
countries
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
General conclusions of the EAGER Network model comparison activities
• Thorough and critical analysis of models and intensive
exchange between participants
weaknesses of all models recognized and improved
all partners and models profited from the exercise
harmonization between calculation procedures started
• Evidence of good comparability between N-flow models
– Indication that models are following the same general procedure
and are based on comparable data and assumptions
• Relatively good agreement for slurry scenarios, the
variation is much higher for solid manure scenarios
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Publications EAGER Network• Reidy B., Dämmgen U., Döhler H., Eurich-Menden B., van Evert F.K.,
Hutchings N.J., Luesink H.H., Menzi H., Misselbrook T.H., Monteny G.-J., Webb J., 2008. Comparison of models used for national agricultural ammonia emission inventories in Europe: liquid manure systems. Atmospheric Environment, 42, 3452-3464
• Reidy B., Webb J., Misselbrook T.H., Menzi H., Luisink H.H., Hutchings N.J., Eurich-Menden B., Döhler H. Dämmgen U., 2009. Comparison of models used for national agricultural ammonia emission inventories in Europe: litter-based manure systems. Atmospheric Environment, 43, 1632-1640
• Webb J, Sommer SG, Kupper T, Groenstein CM, Hutchings N, Eurich-Menden B, Rodhe L, Misselbrook T, Amon B, 2011. Emissions of Ammonia, Nitrous Oxide and Methane During the Management of Solid Manures. In: Agroecology and Strategies for Climate Change. Sustainable Agriculture Reviews 12. Springer, 67–107
Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL
EAGER European Agricultural Gaseous Emissions Inventory Researchers Network
Relationship of EAGER to EPMAN and TFEIP Expert Panel
• EAGER is not competing but supplementing and supporting EPMAN and TFEIP Expert Panel
• TFEIP Expert Panel focusses on emission inventory work “tier 1 and 2 level“
• EAGER focuses on emission inventory work “tier 3 level“
• EPMAN focuses on mitigation options
• TFRN focuses on whole N-cycle strategies
• EAGER members actively participate in TFRN/EPMAN/TFEIP/WGSR work