Sensitivity of Long-Range Transport of Sulfur Compounds to Vertical Distribution of Sources

Numerical experiments using a long-rage transport model of sulfur compounds were carried out to investigate influences of vertical distribution of sources on deposition fields in East Asia. Monthly dry depositions of SOx emitted from a source placed at the center of the domain were insensitive to the vertical distribution of the source, with increasing distance from the source. The depositions at the source grid strongly reflected the emission intensity in the lowest layer. The vertical distribution of sources affected the source-receptor relationships at receptors near locally large emissions but not so much at remote receptors. It was presented that long-rage transport was not influenced by the vertical distribution of sources, i.e., far sources may be treated as either area sources or elevated sources.