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近30a来托木尔峰南麓科其喀尔冰川冰舌区变化

Variation of Keqikaer Glacier Terminus in Tomur Peak during Last 30 Years

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【作者】 谢昌卫丁永建刘时银李宾朱国才

【Author】 XIE Chang-wei~(1), DING Yong-jian~(1), LIU Shi-yin~(1), LI Bing~(2), ZHU Guo-cai~(1)(1.Cold and Arid Regions Environmental and Engineering Research Institute,Chiness Academy of Sciences,Lanzhou Gansu 730000,China;2.Xinjiang Highway Planning,Survey,Design and Research Institute,rümqi Xinjiang 830006,China)

【机构】 中国科学院寒区旱区环境与工程研究所新疆公路规划勘察设计研究院中国科学院寒区旱区环境与工程研究所 甘肃兰州730000甘肃兰州730000新疆乌鲁木齐830006

【摘要】 20世纪80年代中期以来,托木尔峰南麓地区冰雪融水量明显增加,冰川处于强烈的消融退缩状态.根据对科其喀尔冰川冰舌区不同海拔探测表明,近30 a来冰川厚度明显减薄,冰舌区平均厚度减薄在0.5~1.5 m.a-1之间.对科其喀尔冰川末端位置研究表明,科其喀尔冰川进入20世纪90年代以来处于比较强烈的退缩状态.相对于1974年的冰川位置,冰川退缩了380 m左右.科其喀尔冰川的全面退缩,标志着托木尔峰地区冰川处于全面的负物质平衡状态.

【Abstract】 Using radio echo sounder,ice thickness of the Keqikaer Glacier tongue was measured in 1981 and 2004,respectively.In this paper the changes of thickness and advance/retreat of Keqikaer Glacier is studied from comparing topographical maps, aerial photos and satellite images obtained at different time.Results indicated that the Keqikaer Glacier has retreated since the 1990s and become thinner since the 1980s.Thickness of the ice tongue has decreased with a speed of 0.51.5 m5a-1 since 1981.The shrinkage of the glacier terminus is less than 2% of the total length during the last 30 years.The retreat of terminus position and the thinning of ice thickness give significant information that glaciers on the south slopes of Tomur Peak are decreasing intensively in the recent time.

【基金】 国家自然科学基金项目(40371026);中国科学院知识创新工程项目(KZCX3-SW-345)资助
  • 【文献出处】 冰川冻土 ,Journal of Glaciology and Geocryology , 编辑部邮箱 ,2006年05期
  • 【分类号】P343.6
  • 【被引频次】23
  • 【下载频次】358
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