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干旱区地理 >

2024 , Vol. 47 >Issue 7: 1127 - 1135

DOI: https://doi.org/10.12118/j.issn.1000-6060.2024.105

第三次新疆综合科学考察

昆仑山北坡地表水氢氧稳定同位素空间分布特征

  • 石玉东 ,
  • 王圣杰 ,
  • 张明军 ,
  • 朱成刚 ,
  • 车彦军
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  • 1.西北师范大学地理与环境科学学院，甘肃 兰州 730070
    2.中国科学院新疆生态与地理研究所，新疆 乌鲁木齐 830011
    3.宜春学院地理科学系，江西 宜春 336000
石玉东（1995-），男，博士研究生，主要从事全球变化与水循环过程研究. E-mail: syd_1995@126.com
王圣杰（1987-），男，副教授，主要从事同位素水文气候研究. E-mail: geowang@126.com

收稿日期: 2024-02-23

  修回日期: 2024-05-07

  网络出版日期: 2024-07-30

基金资助

国家科技基础资源调查专项(2021xjkk0101);国家自然科学基金项目(42261008)

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Spatial distribution characteristics of stable hydrogen and oxygen isotopes in surface waters on the northern slope of the Kunlun Mountains

  • SHI Yudong ,
  • WANG Shengjie ,
  • ZHANG Mingjun ,
  • ZHU Chenggang ,
  • CHE Yanjun
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  • 1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
    2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
    3. Department of Geographical Science, Yichun University, Yichun 336000, Jiangxi, China

Received date: 2024-02-23

  Revised date: 2024-05-07

  Online published: 2024-07-30

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摘要

氢氧稳定同位素作为示踪剂被广泛用于水文循环过程研究。地表水是水循环的重要组成部分，是区域水汽来源和现代水文过程分析的有效载体。基于新疆第三次科学考察，于2018年8月至2023年8月在昆仑山北坡采集了地表水样本并测量其氢氧稳定同位素数据，同时汇编了区域以往的地表水同位素数据，分析了昆仑山北坡地表水氢氧稳定同位素的空间分布特征。结果表明：（1） 昆仑山北坡地表水同位素值呈现出西低东高的空间变化特征，区域地表水线为δ2H=5.98×δ18O-6.86（R2=0.65，n=141）。（2） 对比昆仑山北坡地表水和降水氢氧稳定同位素值发现地表水同位素平均值普遍低于加权降水同位素值。（3） 昆仑山北坡地表水同位素空间格局受到西风携带的外来水汽和局地再循环水汽共同影响，此外蒸发也会改变区域地表水同位素值。

关键词： 昆仑山北坡; 地表水; 氢氧稳定同位素; 新疆

本文引用格式

石玉东 , 王圣杰 , 张明军 , 朱成刚 , 车彦军 . 昆仑山北坡地表水氢氧稳定同位素空间分布特征[J]. 干旱区地理, 2024 , 47(7) : 1127 -1135 . DOI: 10.12118/j.issn.1000-6060.2024.105

Abstract

Stable hydrogen and oxygen isotopes are widely used as tracers in studying hydrologic processes. Surface water is an important component of the water cycle, and it is an effective vehicle for analyzing regional moisture sources and modern hydrologic processes. We collected surface water samples from August 2018 to August 2023 on the northern slope of the Kunlun Mountains during the Third Xinjiang Scientific Expedition and measured the stable hydrogen and oxygen isotope values. Additionally, we compiled the previous surface water isotope data in the region. We analyzed the spatial distribution characteristics of the stable hydrogen and oxygen isotopes of surface water on the northern slope of the Kunlun Mountains. The results showed that: (1) The surface water isotope values on the northern slope of the Kunlun Mountains showed spatial variations characterized by low values in the west and high values in the east. The local surface water line is δ2H=5.98×δ18O-6.86 (R2=0.65, n=141). (2) A comparison of the stable isotope values of surface water and precipitation on the northern slope of the Kunlun Mountains reveals that the regional surface water isotope value averages are generally lower than the weighted precipitation isotope values. (3) The spatial distribution of surface water isotopes on the northern slope of the Kunlun Mountains is influenced by the interplay of two key factors: the water vapor advection by westerly winds and the local recycled moisture; additionally, evaporation also changed the regional surface water isotope values.

Key words： the northern slope of Kunlun Mountains; surface water; stable hydrogen and oxygen isotopes; Xinjiang

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