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积雪中不溶微粒与Mg2+的沉积特征和相互关系

, PP. 143-147

Keywords: 不溶微粒,气溶胶,矿物粉尘,Mg2+浓度,沉积过程,1号冰川,乌鲁木齐河,天山

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Abstract:

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4130m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直分布亦具有很好的相似性,表现出相同的演化趋势,暗示两者在后沉积过程中的相关性。这种相关性被证明与同期温度变化呈现出明显的负相关。

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