An Improved Process Based Ammonia Emission Model for Agricultural Sources – Emission Estimates

Content Provider	CiteSeerX
Author	Xin, Hongwei Arogo, Jactone Rumery, Thomas R. Fadel, James G. Wang, Zion Liang, Yi Zhang, Ruihong Mansell, Gerard E.
Abstract	Ammonia is an important atmospheric pollutant that combines with sulfuric acid and nitric acid to form aerosol sulfates and nitrate, respectively. These aerosol species are major components of fine particulate matter (PM) and contribute significantly to visibility impairment. Estimates of ammonia emission factors are both highly variable and uncertain. Emissions factors vary depending on meteorological conditions and seasonal and regional differences in farming practices. Previous ammonia emissions inventories have not adequately characterized seasonal and geographical variations in emissions factors. Recent chemical transport modeling suggests that daily and hourly variability in ammonia emissions is required to model accurately the formation of ammonium nitrate and ammonium sulfates. In a companion paper, the development of a process-based model for predicting or estimating ammonia emission rates and factors from individual or a group of animal feeding operations at local, regional and national levels was presented. This paper discusses the data requirements and implementation of the process-based ammonia emission model. Preliminary emission estimates developed from the process-based ammonia emission model are also presented. Detailed description of
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Subject Keyword	Preliminary Emission Estimate Data Requirement Visibility Impairment Ammonia Emission Geographical Variation Improved Process Meteorological Condition Process-based Ammonia Emission Model Ammonia Emission Rate Ammonia Emission Model Agricultural Source Emission Estimate Sulfuric Acid Ammonia Emission Factor Ammonium Nitrate Process-based Model Important Atmospheric Pollutant Ammonium Sulfate Hourly Variability Fine Particulate Matter Emission Factor Previous Ammonia Emission Inventory Aerosol Sulfate Aerosol Specie Nitric Acid Recent Chemical Transport
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