Emissions of Air Pollutants in the North West Region of England J.W.S
Transactions on Ecology and the Environment vol 4, © 1994 WIT Press, www.witpress.com, ISSN 1743-3541 Emissions of air pollutants in the north west region of England J.W.S. Longhurst, S.J. Lindley, D.E. Conlan, A.F.R. Watson Atmospheric Research and Information Centre, Department of Environmental and Geographical Sciences, Manchester Metropolitan University, Chester Street, Manchester Ml 5GD, UK ABSTRACT An emissions estimate for SO,, NO,, CO, CO,, VOCs, black smoke and lead in the North West of England is presented for 1987 and 1991. Calculations are made on a pro-rcita basis and the value of this approach is discussed within the framework of alternative emission estimation methodologies. Estimates, their spatial characteristics and temporal trends are then presented for each species considered. Finally, the relative position of the North West is considered within the context of the United Kingdom as a whole. INTRODUCTION Most emission estimates are made at the national level. There is, however, a need for complimentary estimations at regional and local scales as a key component in the formulation of successful air quality management plans [1]. Studies concerning emissions of pollutants form an important pre-cursor to modelling and the understanding of ambient concentrations at the local scale as well as providing an input to local air quality management plans [2, 3]. This work updates a previous paper which estimates emissions of SO?, NO*, HC1 and NH, from the North West region of England for the year 1987 using a pro-rota approach [1]. The aim has been to expand upon the number of species considered, develop a more refined pro-rota methodology and to provide a temporal comparison between the initial base year of 1987 and a new base year of 1991.
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