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冰川冻土 ›› 2021, Vol. 43 ›› Issue (1): 49-60.doi: 10.7522/j.issn.1000-0240.2020.0038

• 冰冻圈与全球变化 • 上一篇    下一篇

1970—2016年阿尔金山冰川长度变化

张聪1(), 姚晓军1(), 刘时银2,3, 张大弘1, 许君利4   

  1. 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 西北生态环境资源研究院 冰冻圈科学国家重点实验室,甘肃 兰州 730000
    3.云南大学 国际河流与生态安全研究院,云南 昆明 650091
    4.盐城师范学院 城市与规划学院,江苏 盐城 224002
  • 收稿日期:2019-11-28 修回日期:2020-07-03 出版日期:2021-02-28 发布日期:2021-04-06
  • 通讯作者: 姚晓军 E-mail:zc1549350717@163.com;yaoxj_nwnu@163.com
  • 作者简介:张聪,硕士研究生,主要从事环境科学与地理信息系统研究. E-mail: zc1549350717@163.com
  • 基金资助:
    国家自然科学基金项目(41561016);科技部科技基础性工作专项(2013FY111400);云南大学引进人才科研项目(YJRC3201702);西北师范大学青年教师科研能力提升计划项目(NWNU-LKQN-14-4)

Variation of glacier length in the Altun Mountains during 1970—2016

Cong ZHANG1(), Xiaojun YAO1(), Shiyin LIU2,3, Dahong ZHANG1, Junli XU4   

  1. 1.College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China
    2.State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.Institute of International Rivers and Eco-security,Yunnan University,Kunming 650091,China
    4.College of Urban and Plans,Yancheng Teachers University,Yancheng 224002,Jiangsu,China
  • Received:2019-11-28 Revised:2020-07-03 Online:2021-02-28 Published:2021-04-06
  • Contact: Xiaojun YAO E-mail:zc1549350717@163.com;yaoxj_nwnu@163.com

摘要:

长度是冰川的重要几何参数,对于认识冰川动态特征和模拟冰川厚度具有重要价值。基于阿尔金山第一次和第二次冰川编目数据及Landsat OLI遥感影像,利用冰川中流线方法提取了阿尔金山1970年、2010年和2016年的冰川长度数据,并结合气象资料分析了冰川长度对气候变化的响应。结果表明:2016年阿尔金山共有冰川507条,面积272.95 km2,平均长度为1.02 km,长度为2~5 km和0.2~1 km的冰川分别构成了该山系冰川面积和数量的主体。1970—2016年阿尔金山冰川面积减少了53.07 km2(变化速率为-1.15 km2·a-1),冰川长度平均缩短了0.26 km(变化速率为-5.65 m·a-1),其中西段冰川长度相对变化速率明显快于东段,且2010—2016年冰川退缩速率明显快于1970—2010年,气温升高是导致阿尔金山冰川退缩的主要原因。冰川长度与冰川面积、周长有较强的相关性,冰川长度变化与冰川消融区面积变化及末端海拔上升有较强的正相关关系,即冰川消融区面积减少越多,冰川末端海拔上升越高,冰川末端长度的减少值也越大。

关键词: 冰川长度, 中流线, 冰川编目, 气候变化, 阿尔金山

Abstract:

Glacier length is an important geometric parameter of glacier, which is valuable for understanding the characteristics of glacier change and simulating glaciers’ thickness. Based on the first and second glacier inventory of China and Landsat OLI images, the vectorized datasets of glacier length in 1970, 2010 and 2016 in the Altun Mountains were extracted by using the streamline method of glacier, and the response of glacier length to climate change was analyzed in combination with meteorological data. The results showed that: There were 507 glaciers in the Altun Mountains in 2016, with an area of 272.95 km2 and an average length of 1.02 km; glaciers with a length of 2~5 km and 0.2~1 km constituted the main body of the area and number of glaciers in the mountain system. From 1970 to 2016, the area and average length of glaciers in the Altun Mountains had decreased by 53.07 km2 (with changing rate of -1.15 km2·a-1) and 0.26 km (with changing rate of -5.65 m·a-1), respectively; the relative changing rate of glacier length in west had been significantly faster than that in east; the retreat rate of the glacier from 2010 to 2016 had been significantly faster than that from 1970 to 2010, mainly due to the rise of temperature. Glacier length had a good correlation with glacier area and glacier circumference, and there was a good positive correlation of the change in glacier length with the change in glacier ablation area and the elevation rise of the terminus; in other words, the more the glacier ablation area shrinks, the more the elevation of the terminus rises.

Key words: glacier length, center flow line, glacier inventory, climate change, Altun Mountains

中图分类号: 

  • P343.6