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冰川冻土 ›› 2014, Vol. 36 ›› Issue (5): 1271-1279.doi: 10.7522/j.issn.1000-0240.2014.0152

• 寒旱区水文水资源 • 上一篇    下一篇

阿尔泰山蒙赫海尔汗冰川不同水体稳定同位素空间分布特征及水汽来源

侯浩1, 侯书贵1,2, 庞洪喜1   

  1. 1. 南京大学 地理与海洋科学学院, 江苏 南京 210046;
    2. 中国科学院 寒区旱区环境与工程研究所 冰冻圈科学国家重点实验室, 甘肃 兰州 730000
  • 收稿日期:2014-02-18 修回日期:2014-06-03 出版日期:2014-10-25 发布日期:2014-11-19
  • 通讯作者: 侯书贵, E-mail:shugui@nju.edu.cn E-mail:shugui@nju.edu.cn
  • 作者简介:侯浩(1989-), 男, 江苏徐州人, 2011年毕业于南京大学, 现为硕士研究生, 主要从事冰川水体中稳定同位素的研究工作. E-mail:h517984357@163.com
  • 基金资助:

    全球变化研究国家重大科学研究计划项目(2010CB951401)资助

Stable isotopes in different water samples on the Monh Hayrhan Glacier, Altay Mountains: Spatial distribution features and vapor sources

HOU Hao1, HOU Shugui1,2, PANG Hongxi1   

  1. 1. School of Geographic and Oceanographic Science, Nanjing University, Nanjing 210046, China;
    2. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2014-02-18 Revised:2014-06-03 Online:2014-10-25 Published:2014-11-19

摘要:

通过对2010年6月下旬于阿尔泰山蒙赫海尔汗冰川北支采集的新降雪、再冻结冰、冰雪融水、河水及雪坑样品中δ18O和δD的测定以及过量氘的计算, 利用HYSPLIT气团轨迹模型, 对研究区降水中稳定同位素的空间分布特征及水汽来源进行了初步研究. 结果表明: 新雪、再冻结冰以及河水样品中δ18O的空间分布均呈现出显著的“反高度效应”特征, 这是降雪过程中不同海拔高度水汽来源的差异造成的; 不同水体样品中均有较高的过量氘, 说明内陆再循环水汽长期对研究区的降水产生显著影响. 进一步分析表明, 影响研究区降水的内陆再循环水汽主要来自于西西伯利亚平原湿地和沼泽的蒸散发.

关键词: 阿尔泰山, 蒙赫海尔汗冰川, 稳定同位素, 水汽来源

Abstract:

Altay Mountains are the northern periphery of the central Asian mountain system and the southern periphery of the Asian Arctic basin, which makes those mountains ideal areas for analyzing climatic records relating to both westerly jet and polar air mass. Some fresh snow, regelation ice, river water and snow pit samples from the Monh Hayrhan Glacier, Altay Mountains, were collected in June 2010. These samples of δ18O and δD were determined and their d-excess values were calculated. It is found that δ18O of all the samples from fresh snow, regelation ice and river water increase with altitude. Based on the HYSPLIT air trajectory model, the reverse tendencies to different transmission sources of moisture at different altitudes were derived. At high altitude, water vapor evaporated from the Caspian might make the biggest contribution to the snow, while at low altitude most of the water vapor might come from Arctic or West Siberia. On the other hand, the high d-excess in all samples indicate that, at least in the early summer of 2010, the re-evaporated vapor makes a great contribution to the precipitation in the study area. The mean backward trajectories show that during this time vapor sources in the study area are mainly related to the evaporation over West Siberia, one of the largest wetland in the world.

Key words: Altay Mountains, Monh Hayrhan Glacier, stable isotope, vapor source

中图分类号: 

  • P343.6