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(55-04) New Insights into Long-Range Transport Potential of Semivolatile Organic Compounds Using a Multicompartment Chemistry-Transport Model. Lammel, G.*,1, Leip, A.2, 1 Max Planck Institute for Meteorology, Hamburg, Germany2 University of Hamburg, Meteorological Institute, Hamburg, Germany ABSTRACT- A complex (3D, dynamic) multicompartment chemistry-transport model which is based on a general circulation model of the atmosphere was used for the study of the multimedia environmental fate of semivolatile organic compounds (SOCs). These are characterized with respect to their long-rangs transport potentaila nd persistence using appropriate, partly new, indicators. We use more than one indicator to characterize long-range transport, which is a multidimensional phenomenon. These measures are a function of time elapsed since entry, time profile of emission and of location, time and mode of entry. They are applicable to distributions in individual media or the total environment and all scenarios of entry, be it point or wide spread area sources. They address either the potential spatial mobility or, by accounting for the degradation since time of entry, the effective spatial mobility. For application of indicators in regulatory contexts they should be related to hazard and risk assessment, respectively. It is found that the spatial scale, compartmental partitioning and geographic mobility of SOC distributions is strongly influenced by the time and location of entry of the substance into the environment. Key words: environmental exposure, multimedia model, long-range transport potential, semivolatile organic compounds |
