地理科学 ›› 1996, Vol. 16 ›› Issue (1): 10-17.doi: 10.13249/j.cnki.sgs.1996.01.10

• 论文 • 上一篇    下一篇

青藏高原可可西里地区现代冰川发育特征

李世杰   

  1. 中国科学院兰州冰川冻土研究所 兰州730000
  • 收稿日期:1994-03-01 修回日期:1995-02-01 出版日期:1996-01-20 发布日期:1996-01-20
  • 基金资助:
    可可西里综合科学考察成果之一.

CHARACTERISTIC OF EXISTING GLACIAL DEVELOPMENT IN THE HOH XIL REGION, QINGHAI-XIZANG PLATEAU

Li Shijie   

  1. Lanzhou Institute, of Glaciology and Geocryology, Academia Sinica, Lanzhou 730000
  • Received:1994-03-01 Revised:1995-02-01 Online:1996-01-20 Published:1996-01-20

摘要: 经野外考察和室内分析计算,青藏可可西里地区发育现代冰川437条,覆盖面积达1552.39km2,冰储量为162.8349km3,成为本区众多河流湖泊水体的重要补给源泉.受气候条件和地形、地势的影响,海拔6000m以上的山地集中分布了本区冰川条数的61.8%,冰川总面积的85.5%,和冰储量的91.4%.冰川平衡线高度的变化表现出从南向北降低;从东南向西升高.这种现象与本区降水量从东南向西北减少的分布相一致.本区冰川普遍退缩,反映了近期气候的变暧.

Abstract: According to the field expedition and statistical data, there are 437 glaciers, covering the total area of 1552. 39 km2 with the ice storage of 162. 8349 km3 in the Hoh Xil re-gion, Qinghai Province, being important water supply sources to the river and lakes in the region. Development of glaciers in this region is clearly affected by the climatic and topo-graphical conditions. Statistical data show that 61.8% of the total glacial number and 85. 5% of the total glacial area with 91. 4% of the total ice storage concentrates in the high mountain areas 6 000 m a. s. 1.. The equilibrium line elevation (ELE) of glaciers is de-creasing with the latitude increasing, average lowering 125m/1. Otherwise, the ELE in-creases from the east to the west in each mountain range, which is coincident with the de-crease in precipitation from east to west, reflecting the vapour in the air coming from the southwest monsoon through the path of southeastern Xizang (Tibet). Besides the precipi-tation caused by the monsoon transporting vapour, the precipitation caused by the local circulation is quite important supply source to the glacial development in the interior mountains. The geomorphological feature of the lake basins alternating with the mountain ranges in the Hoh Xil region is of benefit to the local circulation. In recent period, all of glaciers are retreating with the climate warming.