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INVENTORIES OF CH 4 , N 2 O and NH 3 FROM UK AGRICULTURE Tom Misselbrook, Lorna Brown

INVENTORIES OF CH 4 , N 2 O and NH 3 FROM UK AGRICULTURE Tom Misselbrook, Lorna Brown IGER, North Wyke. GHG Inventory Construction. CH 4 Predominantly Tier 1 methodology Tier 2 methodology for cattle and lambs

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INVENTORIES OF CH 4 , N 2 O and NH 3 FROM UK AGRICULTURE Tom Misselbrook, Lorna Brown

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  1. INVENTORIES OF CH4, N2O and NH3 FROM UK AGRICULTURE Tom Misselbrook, Lorna Brown IGER, North Wyke

  2. GHG Inventory Construction • CH4 • Predominantly Tier 1 methodology • Tier 2 methodology for cattle and lambs • Dairy cattle EF vary from year to year (liveweight and milk yield multipliers) • Other cattle have constant EF • EF for lambs assumed at 40% that for adult sheep. Lambs assumed to live for 6 months.

  3. GHG Inventory Construction • N2O - Animal Waste Management Systems • UK-specific N excretion values used for livestock categories • 20% of total N excreted assumed to volatilise as NH3 or NOx and therefore deducted prior to N2O loss calculations • Distribution of manure into different AWMS based on UK survey data • IPCC default EFs used for each AWMS category • N2O - Agricultural soils • Follows IPCC methodology

  4. NH3 Inventory Construction • Detailed methodology • Not N flow model • Largely empirical emission factors - derived from UK research • Not good for scenario testing

  5. NH3 Inventory Construction • Excel based • 1 worksheet for Version log • 1 worksheet for all input data • calculation worksheets for different sectors (cattle , pigs, sheep, etc.,) • Summary results sheets • by sector • by AWMS

  6. New Model - NARSES • N flow model • model core engine with user interface • Spatial resolution (10km grid) and monthly timesteps • Include abatement measures for scenario testing

  7. Activity data (for all inventories) • Agricultural Census data (annual survey) • Fertiliser use (annual survey) • Management practice data (survey/expert opinion)

  8. Welcome to theJune Agricultural Census The data published on these pages is produced and maintained by the Farming Statistics Team at Defra, Foss House, York. If you have any questions about the census or have any comments on these web pages please contact the team on the following e-mail link farming-statistics@defra.gsi.gov.uk or on telephone 01904 455313. Latest June ResultsAdd to favourites • 47 categories (livestock & crops) • RSD and 95% confidence intervals • Good spatial resolution if required

  9. British survey of fertiliser practice Fertiliser use on farm crops for crop year 2000 • These files are saved in Portable Document Format (pdf) . To read them you will need a • copy of the "Acrobat Reader" software. Click here to download a copy. • Foreword, acknowledgements, contents, list of tables & executive summary • Section A: The British survey of fertiliser practice • Section B: Commentary on fertiliser use in Great Britain • Section C: Tables • Section D: Supplementary survey analysis on fertiliser spreader calibration and testing • Appendix 1: Survey statistics • Appendix 2: BSFP & DEFRA regions in England and Wales • Appendix 3: BSFP regions in Scotland • Appendix 4: UK farm classification scheme • This page was last updated on 29 October 2001 • Home.. Contacting DEFRA... Feedback ... Search… Help • standard errors for average crop application rates • regional resolution ?

  10. Other Issues Emission Factors • GHG - Should we use more UK-specific EFs from ongoing research. In particular, fraction of deposited NH3 which is leached (0.3 IPCC) appears too high. • NH3 - How frequently should we revise EFs with new research data? • All - move towards modelling EFs from management and environmental data. Could combine data from different countries.

  11. Other Issues • Other sources • Hard standings used by livestock - significant for NH3 • Linking GHG and NH3 inventories • More powerful scenario testing

  12. Documentation Details of annual changes Derivation of emission factors detailed Sources of all input data given

  13. Organisations involved SUBMISSION

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