2.18 Modelling the Individual Contributions of Gaseous Emissions Sources to the Deposition of Sulphur and Nitrogen in the UK

摘要

An important application of atmospheric transport models is to estimate the contribution of different sources of emissions to pollutant deposition. This can rarely be achieved by measurement. A simple Lagrangian atmospheric transport model, FRAME, was employed to assess the contribution to sulphur and nitrogen deposition in the UK from 160 different point and area sources in the UK as well as European emissions and international shipping. For the year 2005, the largest emissions sources for dry deposition of SO_x, NO_y and NH_x were power stations, road transport and livestock respectively, comprising 29%, 42% and 52% of the totals. For wet deposition, European emissions were important, comprising 31%, 35% and 41% of total deposition for SO_x, NO_y and NH_x respectively. International shipping emissions of SO_2 and NO_x were also significant, contributing 21% and 17% of wet deposition of SO_x and NO_y.