南极洲伊丽莎白公主地区主要离子沉积方式及nssSO_4~(2-)气候效应研究

通过对１９９６／１９９７年中国首次南极内陆冰盖考察获得的南极洲伊丽莎白公主地区５０ｍ 雪芯样品主要阴、阳离子浓度、通量和积累率关系的研究，揭示以下规律：１）南极洲伊丽莎白公主地区大气中各主要离子浓度足够大，足以使本地区冰雪中主要离子浓度不随积累率的变化而变化，即离子浓度不受积累率的影响。２）各主要离子干、湿沉积所占比重的计算结果表明，本地区离子沉积方式以湿沉积为主。另外，ｎｓｓＳＯ２－４ 的研究结果表明火山爆发的中、短期气候效应在伊丽莎白公主地区反应不明显。

THE STUDY ON THE DEPOSITIONAL STYLES OF MAJOR IONS AND THE CLIMATIC EFFECT OF nssSO_4 ~(2-)IN PRINCESS ELIZABETH LAND,ANTARCTICA

Snow samples collected from a 50 meter firn core along the route of the 1996/1997 Chinese First Antarctic Inland Traverse Expedition in Princess Elizabeth Land,East Antarctica,have been analyzed for chemical composition and oxygen isotope ratio. Analyzing the relationship between the concentration and flux of major ions and accumulation rate can draw the following conclusions. 1) The concentrations of major ions in the atmosphere in the study region is big enough to guarantee the concentrations of the ions do not vary with snow accumulation rate,that is to say,the concentrations of major chemical species are independent of snow accumulation rate. 2) The results of analyzing the depositional styles of major chemical species suggest that wet deposition dominate the major ions flux. In addition,there is no apparent correlation between nssSO 2- 4 fluctuations and isotope profile. This would indicate the climatic effect of volcanism is not evident in the region.