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Concentrations and depositions of SO-2, SO-4-2- etc. in a Chongqing suburban forested area



Concentrations and depositions of SO-2, SO-4-2- etc. in a Chongqing suburban forested area



Water Air & Soil Pollution 85(3): 1299-1304



During the period from 25 May 1991 to 30 May 1992 the atmospheric concentrations and depositions of oxides of sulfur were continuously measured in a suburban masson pine forest which is currently experiencing severe dieback, in Chongqing, China. The annual mean concentrations of SO-2 and particulate SO-4-2- were 220 mu g/m-3 (77 ppbv) and 32 mu g/m-3 respectively. The atmospheric concentrations of these sulfur compounds were high in late autumn and winter. The annual wet and dry depositions of sulfur to the forest as measured by throughfall and stemflow were 93.1 and 46.6 kgSha-1a-1 respectively. These depositions are among the highest level ever reported in the world. Although the cause of the dieback of the masson pine trees has not been unequivocally determined, it is probable that the direct impact of SO-2 is more likely the cause than acid deposition.

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Accession: 008371537

Download citation: RISBibTeXText

DOI: 10.1007/bf00477161


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