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Producing inventories of ammonia and greenhouse gasses from UK agriculture for international reporting requirements - AC0112

Description
The aims of this project are to develop a more detailed, robust inventory model for estimating emissions of ammonia, nitrous oxide and methane from UK agriculture and to deliver inventory estimates for each of these gases for the years 2007 - 2011.

The UK has a requirement to produce robust greenhouse gas (GHG) emission inventories under the Kyoto protocol and to develop mitigation strategies which are reflected in the inventories in order to meet agreed targets. Similarly, under the UNECE Gothenburg protocol and the EU National Emission Ceilings Directive, the UK has a requirement to produce a robust inventory of ammonia emissions and to develop mitigation strategies to meet agreed ceiling targets. The agricultural sector is an important source of these gaseous emissions, accounting for c. 90% of ammonia and c. 40% and 65% of the greenhouse gases methane and nitrous oxide emissions from the UK, respectively. It is important, therefore, that Defra have robust models which are able to provide national emission estimates and an assessment of potential mitigation strategies for these gases from the agricultural sector.

To date, these requirements from the agricultural sector have been met through the use of two independent models, one for GHG (nitrous oxide and methane), using largely default IPCC methodology, and one for ammonia (the NARSES model). There would be great benefits in combining the inventories into a single model, to ensure consistency in the use of underlying agricultural census data, in assumptions regarding agricultural management practices and projections and, particularly, in providing a consistent approach to the modelling of nitrogen flow through the agricultural management system from which both ammonia and nitrous oxide emissions arise. There is also an urgent requirement to develop a more detailed, national-specific methodology for the estimation of GHG emissions from agriculture, in order to more accurately represent emissions and to properly reflect the impact (or potential impact) of implementing mitigation measures.

This project will deliver the annual inventories of ammonia, nitrous oxide and methane emissions from UK agriculture (and at a devolved administration level) for each of the years 2007 - 2011, providing revised projections to 2020 with each submission. The project will combine the currently seperate ammonia and GHG inventories into a single model, using common underlying data and producing output appropriate for the reporting of the individual gaseous emission inventories. The model will enable a detailed, country-specific approach (IPCC Tier 2/Tier 3) for all major sources within the agricultural sector and will be structured to enable full accounting of implementation of mitigation techniques. Close liaison will be developed with international networks aimed at comparing and developing national inventory methodologies (e.g. EAGER, LEARN) to ensure awareness of and active participation in emerging approaches. Good liaison will also be maintained with other Defra-funded research on gaseous emissions from agriculture so that relevant research findings are incorporated into the inventories as is appropriate. A more mechanistic approach to the development of emission factors and assessment of novel mitigation methods will be conducted alongside the national inventory model using other specifically developed models (e.g. UK_DNDC and the GHG inventory framework model developed under Defra project AC0101). Output from these models will be used to inform revisions of the national inventory model. Finally, the modelling of nitrogen losses and transformations within solid manure management systems (currently subject to large uncertainty), will be improved through a targeted measurement approach.
Objective
The overall objectives of this project are to improve and deliver the inventories of ammonia, nitrous oxide and methane emissions from UK agriculture.

Specific objectives are:

1. To revise and update the inventories of ammonia, nitrous oxide and methane emissions from UK agriculture (and at a devolved administration level) for the years 2007, 2008, 2009, 2010 and 2011, including mapping of emissions and revised projection estimates to 2020 with each annual submission.
2. To restructure the current inventory models, combining ammonia, nitrous oxide and methane into a single model.
3. To liaise closely with other research groups both nationally and internationally on gaseous emissions from agriculture and inventory methodology developments.
4. To further improve the national inventory model through derivation of country-specific emission factors and development of more mechanistic modelling approaches for the assessment of improved emission factors and novel mitigation strategies.
5. To develop more robust parameters for nitrogen losses and transformations within solid manure management systems through measurement studies.
Project Documents
• TRP - Technical Report : Additional guidance on methodology   (323k)
• TRP - Technical Report : GHG Inventory 2012 projections summary   (372k)
• TRP - Technical Report : UK Ag GHG Inventory 2010 projections to 2030   (277k)
• TRP - Technical Report : UK Ag GHG Inventory 2011 projections summary v3   (341k)
• TRP - Technical Report : UK Agriculture GHG Emission Projections 2012 base year FINAL   (437k)
Time-Scale and Cost
From: 2008

To: 2018

Cost: £1,475,603
Contractor / Funded Organisations
North Wyke Research, ADAS UK Ltd.
Keywords
Agriculture and Climate Change              
Ammonia              
Bioenergy              
Sustainable Farming and Food Science