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冰川冻土 ›› 2021, Vol. 43 ›› Issue (1): 14-23.doi: 10.7522/j.issn.1000-0240.2019.0001

• 冰冻圈与全球变化 • 上一篇    下一篇

西藏阿里地区大、小昂龙冰川变化观测研究

陈艳辉1,2(), 田立德1,3(), 宗继彪1, 朱大运4,5, 汪诚1,2, 靳胜强1,2   

  1. 1.中国科学院 青藏高原研究所 青藏高原环境变化与地表过程重点实验室, 北京 100101
    2.中国科学院大学, 北京 100049
    3.中国科学院 青藏高原地球科学卓越创新中心, 北京 100101
    4.贵州师范大学 喀斯特研究院, 贵州 贵阳 550001
    5.国家喀斯特石漠化防治工程技术研究中心, 贵州 贵阳 550001
  • 收稿日期:2017-02-15 修回日期:2018-02-15 出版日期:2021-02-28 发布日期:2021-04-06
  • 通讯作者: 田立德 E-mail:einton@itpcas.ac.cn;ldt@itpcas.ac.cn
  • 作者简介:陈艳辉,硕士研究生,主要从事冰川变化研究. E-mail: einton@itpcas.ac.cn
  • 基金资助:
    国家自然科学基金重点项目“青藏高原西部地区冰川冰储量变化及水文效应”(41530748)

Variation of the Large and Small Anglong Glaciers in the Ngari Prefecture, Tibet, China

Yanhui CHEN1,2(), Lide TIAN1,3(), Jibiao ZONG1, Dayun ZHU4,5, Cheng WANG1,2, Shengqiang JIN1,2   

  1. 1.Key Laboratory of Tibetan Environmental Change and Land Surface Processes,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.CAS Center for Excellence in Tibetan Plateau Earth Sciences,Beijing 100101,China
    4.School of Karst,Guizhou Normal University,Guiyang 550001,China
    5.State Key Engineering Technology Research Center for Karst Rocky Desertification Rehabilitation,Guiyang 550001,China
  • Received:2017-02-15 Revised:2018-02-15 Online:2021-02-28 Published:2021-04-06
  • Contact: Lide TIAN E-mail:einton@itpcas.ac.cn;ldt@itpcas.ac.cn

摘要:

在西藏阿里地区狮泉河上游的大、小昂龙冰川开展了连续2年(2014—2016年)的冰川变化地面观测,主要包括冰川表面物质平衡与差分GPS高程变化同步观测,以及冰川表面流速观测,冰川末端观测和冰川雷达测厚。观测结果表明:大、小昂龙冰川表面物质平衡与同期差分GPS观测结果之间存在差异。冰川表面物质平衡结果显示,2014—2016年间,大、小昂龙冰川分别以每年72 mm w.e.和219 mm w.e.的速率减薄。差分GPS观测结果显示,同期大、小昂龙冰川分别以每年(442±90) mm w.e.和(265±90) mm w.e.的速率减薄;在2015/2016年,大、小昂龙冰川表面平均流速分别为4.4 m·a-1和2.3 m·a-1,其中大昂龙冰川表面平均流速较上一物质平衡年增加了10.5%;2014—2016年间,小昂龙冰川先是前进了11 m,之后又退缩了34 m,两年内平均每年退缩11.5 m;大昂龙冰川平均冰厚为67.9 m,实测最大厚度为216 m,根据雷达测厚数据插值计算的冰川储量为0.452 km3;小昂龙冰川实测最大厚度为190 m。

关键词: 青藏高原, 昂龙冰川, 冰川变化, 物质平衡, 差分GPS

Abstract:

A two consecutive years(2014—2016)of research had been conducted on the Large and Small Anglong Glaciers, located in the upper Shiquanhe River, Ngari Prefecture, Tibet Autonomous Region, including simultaneous observation of glacier surface mass balance by stake method and difference GPS, as well as glacier surface flow velocity, change of glacier terminal and ice thickness. The followings were revealed: 1) The results of difference GPS method and the surface mass balance by stake method had differ somewhat for the two glaciers during 2014—2106. The stake method showed that the Large and Small Anglong Glaciers reduced by 72 mm w.e.·a-1 and 219 mm w.e.·a-1, respectively, during 2014—2016. However, the difference GPS method showed that the two glaciers reduced by (442±90) mm w.e.·a-1 and (265±90) mm w.e.·a-1, respectively, at the same time period. 2) The surface flow velocities for the two glaciers were 4.4 m·a-1 and 2.3 m·a-1 in 2015/2016, respectively. 3) During 2014—2016 the Small Anglong Glacier had advanced 11 meters in the first year and then retreated 34 meters in the second year; 4) The volume of the Large Anglong Glacier was 0.452 km3 with an average ice thickness of 67.9 meters and a maximum measured thickness of 216 meters. The maximum thickness of the Small Anglong Glacier was 190 meters.

Key words: Tibetan Plateau, Large and Small Anglong Glaciers, glacier variation, mass balance, differential GPS

中图分类号: 

  • P343.6