Abstract

Abstract The Canadian Atmospheric Environment Service (A ES) Long‐ Range Transport (LRT) model has been used in the Canada‐United States Memorandum of Intent programme to compute transfer matrices in order to quantify the source‐receptor relationships between emission regions and selected receptor sites. Four‐day backward trajectories were computed from the selected sites for the year 1978 and were started from the 925‐mb level(∼600 m). The Lagrangian concentration / deposition model computed sulphur concentrations and depositions for 9 receptor sites using an emissions inventory divided into 15 Canadian and25 United States emission regions. The 40×9 source‐receptor matrices show that the greatest impact on a receptor site usually results from an emission region close to the site although the regions giving the greatest impact for air concentration and wet deposition are not necessarily identical. In addition, the matrices show the impacts of all the emission regions on all of the receptor sites ranked by...

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