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冰川冻土 ›› 2003, Vol. 25 ›› Issue (6): 680-684.

• 冰冻圈与全球变化 • 上一篇    下一篇

慕士塔格峰洋布拉克冰川消融的观测分析

蒲健辰, 姚檀栋, 段克勤   

  1. 中国科学院, 寒区旱区环境与工程研究所冰芯与寒区环境重点实验室, 甘肃, 兰州, 730000
  • 收稿日期:2003-02-05 修回日期:2003-04-12 出版日期:2003-12-25 发布日期:2012-04-26
  • 作者简介:蒲健辰(1952-),男,甘肃天水人,副研究员,1978年毕业于兰州大学地质地理系,主要从事冰川资源和冰川变化研究.E-mail:pujc@ns.lzb.ac.cn
  • 基金资助:
    科技部前期研究项目(2001CCB00300);国家自然科学基金重大研究计划(90202013;90102005);国家自然科学基金项目(40101006;40171020)资助

An Observation on Surface Ablation on the Yangbark Glacier in the Muztag Ata, China

PU Jian-chen, YAO Tan-dong, DUAN Ke-qin   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China
  • Received:2003-02-05 Revised:2003-04-12 Online:2003-12-25 Published:2012-04-26

摘要: 2001年7月4日至8月8日,在慕士塔格峰西侧的洋布拉克冰川海拔4600~4460m区间的冰舌段,进行了短期的冰面消融观测.慕士塔格峰冰川区暖期短,冰面强消融时期比较集中.观测期间,冰面纯消融厚度为640~1260mm水层,日平均消融厚度达26~39.6mm,推算冰舌区年消融量不低于1700~2000mm,比青藏高原内部的冰川消融强烈的多.7月21-22日出现最大消融值,在海拔4460m和4600m,日消融量分别为144.5mm和59.5mm.冰面消融随海拔上升而减小,日平均消融梯度:在裸露冰区为0.40~0.55mm·10m-1;在表碛覆盖区为0.21~3.53mm·10m-1,变幅较裸露冰区大.按裸露冰区的消融梯度计算出海拔4800m处的日平均消融量,和过去的研究资料比较,2001年冰面日平均消融量较1987年和1960年的消融量大,反映出慕士塔格峰区影响冰川消融的气候与全球气候变暖的特点是一致的.

关键词: 慕士塔格峰, 冰川消融, 消融梯度

Abstract: During July 4 to August 8 in 2001, an observation of glacier ablation was made on the area between 4 460 m to 4 600 m a.s.l on the terminus of the Yangbark Glacier on the west of the Muztag Ata. Based on the observation, the ablation features are discussed in this paper. There existed a short warmer period on the glacier, with the maximum ablation mainly in July 21~22 and the maximum daily net ablation of about 144.5 mm water equivalent (w.e.) and 59.5 mm w.e. at the altitude of 4 460 m and 4 600 m a.s.l., respectively. The total net ablation reached to about 640~1 260 mm w.e. and the mean daily ablation about 26~32.8 mm w.e. during this period. Therefore, the annual net ablation is estimated about 1 700~2 000 mm w.e. in this region, which was far more than that of the glaciers on the inner Tibetan Plateau. Meanwhile, the ablation generally decreases with altitude. The ablation gradient is about 0.40~0.55 mm·10 m-1 on the bare ice and 0.21~3.53 mm/10 m on the debris-covered ice. So, the mean daily net ablation at the 4 800 m a.s.l. can be calculated from the ablation gradient on the bare ice. The glacier ablation continuously increases as compared with the observation in 1960 and 1987, according to the background of global warming.

Key words: Muztag Ata, glacier ablation, ablation gradient

中图分类号: 

  • P343.6