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冰川冻土 ›› 1983, Vol. 5 ›› Issue (3): 83-89.

• 研究论文 • 上一篇    下一篇

天山博格达峰扇状分流冰川的冰层温度

任贾文   

  1. 中国科学院兰州冰川冻土研究所
  • 出版日期:1984-11-25 发布日期:2012-04-26

The Ice Temperature of Bogda Fan-Shaped Diffluence Glacier in Bogda Area, Tian Shan

Ren Jiawen   

  1. Lanzhou Institute of Glaciology and Cryopedology, Academia Sinica
  • Online:1984-11-25 Published:2012-04-26

摘要: 发源于博格达峰北坡流向南北坡两个流域的5 Y725D 5及5 Y812B10冰川是博格达峰地区形态类型比较特别的一条冰川,本文合称为博格达扇状分流冰川。1981年中日联合考察队对该冰川考察时,在消融区上部打了一个20米深的钻孔,埋置温度计17只,取得了该冰川的第一批温度资料。

Abstract: Although the glaciers in Bogda area of Tian Shan were investigated in past years, the ice temperature observation was carried out only for the first time.During the joint expedition to Bogda area by Chinese and Japanese glaciologists, a 20 m deep hole was bored with steam drill at some 3750 m a. s. 1. in the upper ablation area of the Bogda Fan-shaped Diffluence Glacier on July 29, 1981.Seventeen thermal resistor thermometers were put into the hole at intervals of 1-2 m, and four observations were taken respectively on 8, 11, 13 and 15 August.Analysis of the records shows that there was a zero temperature layer of liquid water at least 0.5 m deep on the glacier surface in summer. The ice temperature dropped with the increase in depth, and the lowest, being about -3℃, located in the layer 4-7 m deep. Below this layer, temperature went up in a vertical gradient γ=0.148℃/m, and reached the pressure melting point at about 26 m deep. Besides, it was calculated that the equilibrium temperature at the lower limit of the active layer at the equilibrium line of the glacier T0 (16)E equals to -3.4℃. Thus, there might be temperate ice in the lower layer of the glacier. The ice temperature of Bogda Fan-shaped Diffluence Glacier may be higher than other glaciers in Northwest China. Further observation of this glacier may provide new informations for the classification of the continental type glaciers in China.