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The Components of the Glacial Runoff of the Tsambagarav Massif from Stable Water Isotope Data

机译：基于稳定水同位素数据的Tsambagarav地块冰川径流组成

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The aim of this study was to determine the contribution of snow and glacial ice to the river fluxes, and to identify the type of ice formation in the Tsambagarav massif (the northwestern part of Mongolia). The main method for this study was isotopic analysis of water samples. The isotopic separation showed that the shares of the main components in the total runoff differed for different rivers of the massif. Alongside with that, glacial meltwater prevailed in all the investigated fluxes. The share of snow and firn in the meltwater coming from the surface of the large valley glaciers in the middle of the ablation season in 2017 changed by only 10%—from 20% to 30%. Thus, further reduction of glaciation caused by global climate change could significantly affect the water balance of the study area. The isotopic composition of glacial ice proves that its alimentation primarily comes from precipitation during the transitional seasons. Superimposed ice is not the basis for nourishment of the glaciers of the Tsambagarav massif.
机译：这项研究的目的是确定雪和冰川冰对河流通量的贡献，并确定Tsambagarav地块（蒙古西北部）的冰层类型。这项研究的主要方法是对水样进行同位素分析。同位素分离表明，不同地块河流中总径流中主要成分的份额不同。除此之外，所有研究的通量中都以冰川融水为主。在消融季节的中间，来自大山谷冰川表面的融雪中的雪和冷杉所占的比例在2017年消融季节中仅变化了10％，从20％变为30％。因此，由全球气候变化引起的冰川作用的进一步减少可能会严重影响研究区域的水平衡。冰河的同位素组成证明，其营养主要来自过渡季节的降水。叠加的冰不是Tsambagarav断层块冰川营养的基础。

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