积雪中不溶微粒与Mg~（2＋）的沉积特征和相互关系

为了探究不溶微粒和Mg2＋在雪冰沉积过程中的相关性,对采自乌鲁木齐河源1号冰川海拔4 130 m处的雪冰样品进行不溶微粒和Mg2＋浓度的分析。表层雪中不溶微粒和Mg2＋浓度的季节变化具有较好的一致性,在6～8月的降水频发期和局地风盛行时,两者都达到一年中的最大值。粗微粒（直径大于10μm）和Mg2＋浓度在雪层剖面中的垂...

Study on Deposition Characteristics of Insoluble Microparticles and Mg2+ Concentration in Snow Cover and Their Correlation

It is a part of the PGPI(Program for Processe Investigation) to study the relationship between insoluble microparticles and magnesium,and it was initiated at the Tianshan Glaciological Station in July 2002.In this paper,the vertical distribution and evolution process of insoluble microparticle and magnesium concentration along vertical profiles of snow pits as well as their seasonal variation were studied by weekly sampling from a snow pit(4 130 m a.s.l.,in the percolation zone) on Glacier No.1 in the east Tianshan Mountains from September 2003 to September 2004.The analyzed results of insoluble microparticles and magnesium concentration reveal that their change trends were similar in both surface snow and along vertical snow profiles.In winter,insoluble microparticles and magnesium concentrations in surface snow layer were altered slightly by sublimation and wind erosion.In early summer,as snow melting occurred in the upper part of snow-firn pack,snow meltwater carried microparticles and magnesium to different depths of the underlying snow-firn layers,all the surface elements might be leached out from the upper layers at the end of the ablation season.Correlation coefficient between concentration of insoluble microparticles and magnesium along vertical profiles of snow layer showed a significant negative correlation with temperature.