青藏高原可可西里地区现代冰川发育特征

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１５５２．３９ｋｍ＾２，冰储量为１６２．８３４９ｋｍ＾３，成为本区众多河湖泊水体的重要补给源泉。

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

According to the field expedition and statistical data, there are 437 glaciers, covering the total area of 1 552. 39 km2 with the ice storage of 162. 834 9 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.