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冰川冻土 ›› 2013, Vol. 35 ›› Issue (2): 255-262.doi: 10.7522/j.issn.1000-0240.2013.0031

• 冰冻圈与全球变化 •    下一篇

1964-2010年青藏高原长江源各拉丹冬地区冰川变化及其不确定性分析

王媛, 吴立宗, 许君利, 刘时银   

  1. 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000
  • 收稿日期:2012-11-28 修回日期:2013-03-01 出版日期:2013-04-25 发布日期:2013-05-14
  • 通讯作者: 吴立宗,E-mail:wulizong@lzb.ac.cn E-mail:wulizong@lzb.ac.cn
  • 作者简介:王媛(1988-), 女, 内蒙古呼和浩特人, 2010年毕业于河南大学, 现为中国科学院寒区旱区环境与工程研究所在读硕士研究生, 主要从事冰川变化研究. E-mail:wangyuan@lzb.ac.cn
  • 基金资助:

    中国科学院战略性先导科技专项(XDA05090302)资助

Variation and Uncertainty Analysis of the Glaciers in the Past 50 Years in Geladandong of Tibetan Plateau

WANG Yuan, WU Li-zong, XU Jun-li, LIU Shi-yin   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China
  • Received:2012-11-28 Revised:2013-03-01 Online:2013-04-25 Published:2013-05-14

摘要:

利用1964年美国CORONA间谍卫星影像和1976-2010年的Landsat MSS/TM/ETM+遥感影像, 对青藏高原长江源各拉丹冬地区的冰川进行监测, 获得每10 a间隔的冰川面积数据, 并对冰川制图中的不确定性进行了评估.由于冰川表面比较洁净, 认为该地区冰川变化的不确定性主要由分辨率(Landsat)和人为操作差异造成, 误差可达1%~2%.通过对比发现: 1964-2010年间, 各拉丹冬地区冰川面积总体上减少了45.75 km2, 相对变化为6.80%, 冰川年平均变化速度约为0.99 km2·a-1, 相对变化速度为0.15%·a-1; 该地区冰川总体退缩较为缓慢, 但部分冰川变化显著, 在138条冰川中, 有14条大冰川存在较为明显的变化.在过去的近50 a中, 该地区的冰川并不是都呈退缩状态, 先后有9条冰川出现过前进的现象, 其中有1条冰川一直处于前进状态, 长江源头冰川(姜古迪如北支冰川)先后出现过两次前进, 分别发生在1964-1977年间和2000-2010年间.

关键词: 冰川, 冰川变化, 气候变化, 青藏高原, 各拉丹东

Abstract:

The dataset of glacierized area in Geladandong, with 10 years interval, was established on the CORONA satellite images in 1964 and the Landsat MSS/TM/ETM images from 1976 to 2010. As the glacierized surface is relatively clean, the uncertain of glacierized area, about 1%~2% of the total area, mainly caused by the satellite image resolution (Landsat) and different operators. The contrast of glacierized area in different periods shows that the total glacierized area in Geladandong decreased by 45.75 km2 from 1964 to 2010 and the relative change amount was 6.80%; the annual average change rate was 0.99 km2·a-1 and the relative change rate was 0.15%·a-1. Generally the glacier in Geladandong retreated slowly. Among 138 glaciers there are 14 ones having significant changed in the past 50 years and not all the glaciers having retreated. Nine glaciers had advanced at different periods and one of them advances all the time. There is a glacier at the source of the Yangtze River (north branch of Jianggudiru Glacier) having advanced twice during the periods of 1964-1977 and 2000-2010.

Key words: glacier, glacier variation, climate change, Tibetan Plateau, Geladandong

中图分类号: 

  • P343.6