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Title: A spatio-temporal ammonia emissions inventory for the UK
Author: Hellsten, Sofie
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2006
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The aim of the present study is to provide a new, updated spatial NH3 emission inventory for the UK, building on the established AENEID model (Atmospheric Emissions for National Environment Impacts Determination). Improvements to the model were implemented for the distribution methodology of pig and poultry manure, a spatially varying cattle grazing season was incorporated, and the temporal resolution improved from annual to monthly emission estimates. A variable emission source strength was incorporated by linking the model with the NARSES N-flow model, a current tool used in the UK for assessing abatement efficiencies. Uncertainties in the spatial NH3 emission inventory resulting from the aggregation of zones in the agricultural statistics were also assessed, showing that such aggregation has a significant impact on the spatial location of emissions. The new distribution methodology for emissions from pig and poultry manure is based on an iterative process, taking into account the “manure saturation rate” to agricultural land, and provides more realistic results than the original model where all emissions were distributed within the parish of origin. The cattle grazing season in the UK varies significantly throughout the country and also between years. By incorporating a sub-model of housing emissions, associated storage and spreading emissions and grazing emissions. The monthly ammonia emission maps showed a strong seasonal emission pattern, with the highest modelled emissions occurring in springtime and the lowest emissions during summer. The total UK agricultural NH3 emission for year 2000, based no the new AENEID approach, was estimated at 221 kt NH3-N or 268 kt NH3.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available