【摘要】 消融期前冰川积累量随海拔线性增加，消融期冰川总消融随海拔线性减少。季节零平衡线的移动和正积温密切相关。根据总消融率和冰川面积随海拔的分布，计算了冰川融水量随海拔的分布。冰川平衡线、平均消融线和平均海拔线相互接近。平衡线可作为估算冰川融水量的一个标准位置。更多还原

【Abstract】 Based on the mass balance measurement on Glacier No.1 by Tianshan Glaciological Sta-tion in the souree area of the Urumqi River during the years from 1980 to 1989, this paper isintended to analyse the distribution of the premelt accumulation, the movement of the sea-sonal zero balance line and the altitude dependency of glacial meltwater. The altitude gra-dient of the premelt accumulation is 51mm／100m water equivalent for the east branch ofGlacier No.1, and 76mm／100m for the wast branch.The seasonal variation of the altitudegradient of mass balance is large. The movement of the seasonal zero balance line has goodcorrelation with the cumulative air temperature of the positive daily mean values. The alti-tude gradient of the total melt is -720mm／100m·a^-1 for the east branch and -780mm／100m·a^-1 for the west branch. A large amount of meltwater is produced from theglacial ablation area, but the distribution of melt water with altitude is also controlled by theglacial hypsometric curve. The equilibrium line, mean melt line and mean altitude line of theglacier are close to one another. The equilibrium line can be taken as a standard position forthe calculation of the glacial mean melt.更多还原