Anthropogenic Emissions of Reduced Sulfur Compounds from Municipal Landfill sanitary sites

The gaseous sulfur compounds which produce sulfate aerosols in The atmosphere play an important rolein various global environmental problems. in particular，carbonyl sulfide (COS) influences the stratospheric ozone destruction and the global warming throughformation of the stratospheric aerosols. However，它的贡献是不evaluated enough. Moreover，the evaluation of anthropogenic emissions of COS和carbon disulfide (CS2) which is the precursorCOS is insufficient.In this study，the contribution of the formation of the stratospheric aerosols was reevaluated，and the emissions of reduced sulfur compounds from municipal landfill sanitary sites were measured.The main findings are as follows. The results from 1-D model calculation indicate that Thecontribution of the formation of the stratospheric aerosols has been increasing due to therecent decrease of the stratospheric ozone concentration. the measurements of the landfill emissionsof reduced sulfur compounds indicate that the landfill which contain biodegradable components emitlarge amount of reduced sulfur species. However，这是发现the landfill emission from industrialized nations contribute little to the globalcos阿budget。

The gaseous sulfur compounds which produce sulfate aerosols in the atmosphere play an important role in various global environmental problems. In particular, carbonyl sulfide (COS) influences the stratospheric ozone destruction and the global warming through formation of the stratospheric aerosols. However, its contribution is not evaluated enough. Moreover, the evaluation of anthropogenic emissions of COS and carbon disulfide (CS2) which is the precursor of COS is insufficient.In this study, the contribution of COS to the formation of the stratospheric aerosols was reevaluated, and the emissions of reduced sulfur compounds from municipal landfill sanitary sites were measured. The main findings are as follows.・The results from 1-D model calculation indicate that the contribution of COS to the formation of the stratospheric aerosols has been increasing due to the recent decrease of the stratospheric ozone concentration.・The measurements of the landfill emissions of reduced sulfur compounds indicate that the landfill which contain biodegradable components emit large amount of reduced sulfur species. However, it was found that the landfill emission from industrialized nations contribute little to the global COS budget.