Abstract
Two atmospheric chemistry transport models (FRAME and MSC-East) were applied to simulate the concentration and deposition of Cd and Pb in the UK. The modelled data was compared with annually averaged measured wet deposition of metals and concentrations in air. The models obtained good correlation with measurements of metal concentrations in air when estimates of wind-driven re-suspended emissions were included but large underestimates when only primary emissions were included. The results suggest that, following major reductions of heavy metal emissions in the UK, re-suspension now makes a larger contribution to total emissions than primary sources.
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