关键词: 离子, 干沉积, 湿沉积, 火山, 南极

Abstract: 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.