摘要
2005年9月底，在黄河源区阿尼玛卿山耶和龙冰川随海拔变化采集89个雪样，分析了微粒和主要可溶无机离子（Na^＋，K^＋，Mg^2＋，Ca^2＋，NH4^＋，Cl^-，NO3^-，SO4^2-浓度以及δ18O，研究了各种物理化学指标在冰川中的时空分布特征．结果表明：大多数样品中主要阴、阳离子当量摩尔浓度顺序为：NO3^-〉SO4^2-〉Cl^-Ca^2＋〉NH4^＋〉Na^＋〉Mg^2＋〉K^＋碳酸盐类物质是化学离子主要来源．各种主要可溶离子有着明显的季节变化过程．但由于融化再凝结过程，不是所有离子在污化层浓度最大．在所采样区域的表层雪中化学离子没有明显变化趋势，指示局地物质的输入有限．受降水量效应影响，暖季δ18O值低，冷季高．样品中，9种离子被分为：1）Ca^2＋，Mg^2＋和HCO3^-CO3^2-;2）NH4^＋，SO4^2-和Cl^-；3）NO3^-；4）Na^＋，K^＋四个群组．
In October 2005 from surface snow and six tion of Yehelong Glacier samples were collected snow pits along a section of Yehelong Glacier. Their major ions and 3180 were analyzed. The analyses indicate that themajor anion and cation concentration sequences rank as follows ： NO3^-〉SO4^2-〉Cl^-Ca^2＋〉NH4^＋〉Na^＋〉Mg^2＋〉K^＋ Major ions and oxygen isotope ratio have obvious seasonal change, but not all ions have highconcentration in dirty layer, for instance, NO3^-, SO4^2-, Cl^-, due to the disturbance of melting-re-freezing process. Insignificant spatial currents were observed over the surface snow that indicate the influence of local source is limited. Depletion 8180 in snowfall of warm season due to ＂amount el-fort＂. Cluster analysis was used to investigate the composition characteristics of major ions, and all ions can be divided into four groups.
出处
《冰川冻土》
CSCD
北大核心
2008年第3期415-420,共6页
Journal of Glaciology and Geocryology
基金
中国科学院百人计划项目(40121101)
国家重点基础研究发展计划(973计划)项目(2005CB422003)
国家杰出青年科学基金项目(40525001)资助
关键词
雪冰化学
阴
阳离子
Δ18O
chemistry of snow and ice
anion
cation
δ18O
