【摘要】 采用乌鲁木齐河流域历年采集的降水、表层粒雪、冰川融水和河川径流等水样资料,分析了取样期间不同水样中氧稳定同位素的变化,揭示了降水中氧稳定同位素变化存在着明显的温度效应,而温度效应又与海拔高度有关;表层粒雪和冰川融水中氧稳定同位素则无明显的高度效应;冰川融水中的氧稳定同位素比率小于河川径流中的氧稳定同位素比率。评估了不同影响因子对水循环过程中稳定同位素变化的影响及相互作用,为稳定同位素技术在水循环研究中的应用提供了实例。更多还原

【Abstract】 The variations of stable oxgen isotopic in different water mediums are analyzed for the period of sampling using the data in precipitation, surface firn, glacier melt water and stream water sampling in Urumqi River basin.It reveals that there is marked temperature effect on stable oxygen isotope in precipitation, and the effect relates to the altitude.However, no marked altitude effect is found in the surface firn and the glacier melt water; the stable oxygen isotopic ratios in glacier melt water are all lower than those in stream water.Furthermore, the impact degree of different factors on the variations of stable oxygen isotope in the process of water cycle and their interaction are evaluated in the study, which provides an example for the application of stable isotopic technique to the study on water cycle.更多还原